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Finding the Fourth Proportional to 639,397,203.90, 959,095,805.85 and 432,772,943.10

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Solution

The fourth proportional to 639,397,203.90, 959,095,805.85 and 432,772,943.10 is: 649,159,414.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,397,203.90 : 959,095,805.85 = 432,772,943.10 : x
  2. Step 2: Convert to fraction form
    639,397,203.90/959,095,805.85 = 432,772,943.10/x
  3. Step 3: Cross multiply
    639,397,203.90x = 959,095,805.85 × 432,772,943.10
  4. Step 4: Simplify right side
    639,397,203.90x = 415,070,714,612,570,752
  5. Step 5: Solve for x
    x = 415,070,714,612,570,752/639,397,203.90
  6. Step 6: Final answer
    x = 649,159,414.65

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.