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Finding the Fourth Proportional to 631,988.32, 872,146.96 and 345,508.40

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Solution

The fourth proportional to 631,988.32, 872,146.96 and 345,508.40 is: 476,803.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,988.32 : 872,146.96 = 345,508.40 : x
  2. Step 2: Convert to fraction form
    631,988.32/872,146.96 = 345,508.40/x
  3. Step 3: Cross multiply
    631,988.32x = 872,146.96 × 345,508.40
  4. Step 4: Simplify right side
    631,988.32x = 301,334,100,714.46
  5. Step 5: Solve for x
    x = 301,334,100,714.46/631,988.32
  6. Step 6: Final answer
    x = 476,803.27

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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.