Home / 639,397,189.40-959,095,784.10-432,772,928.60

Finding the Fourth Proportional to 639,397,189.40, 959,095,784.10 and 432,772,928.60

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Solution

The fourth proportional to 639,397,189.40, 959,095,784.10 and 432,772,928.60 is: 649,159,392.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,397,189.40 : 959,095,784.10 = 432,772,928.60 : x
  2. Step 2: Convert to fraction form
    639,397,189.40/959,095,784.10 = 432,772,928.60/x
  3. Step 3: Cross multiply
    639,397,189.40x = 959,095,784.10 × 432,772,928.60
  4. Step 4: Simplify right side
    639,397,189.40x = 415,070,691,292,870,336
  5. Step 5: Solve for x
    x = 415,070,691,292,870,336/639,397,189.40
  6. Step 6: Final answer
    x = 649,159,392.90

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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.