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Finding the Fourth Proportional to 628,062.16, 866,707.24 and 356,154.80

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Solution

The fourth proportional to 628,062.16, 866,707.24 and 356,154.80 is: 491,483.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,062.16 : 866,707.24 = 356,154.80 : x
  2. Step 2: Convert to fraction form
    628,062.16/866,707.24 = 356,154.80/x
  3. Step 3: Cross multiply
    628,062.16x = 866,707.24 × 356,154.80
  4. Step 4: Simplify right side
    628,062.16x = 308,681,943,720.75
  5. Step 5: Solve for x
    x = 308,681,943,720.75/628,062.16
  6. Step 6: Final answer
    x = 491,483.11

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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.