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Finding the Fourth Proportional to 639,878.16, 883,026.44 and 353,392.10

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Solution

The fourth proportional to 639,878.16, 883,026.44 and 353,392.10 is: 487,678.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,878.16 : 883,026.44 = 353,392.10 : x
  2. Step 2: Convert to fraction form
    639,878.16/883,026.44 = 353,392.10/x
  3. Step 3: Cross multiply
    639,878.16x = 883,026.44 × 353,392.10
  4. Step 4: Simplify right side
    639,878.16x = 312,054,567,987.12
  5. Step 5: Solve for x
    x = 312,054,567,987.12/639,878.16
  6. Step 6: Final answer
    x = 487,678.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.