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Finding the Fourth Proportional to 657,861.17, 907,851.18 and 356,055.17

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Solution

The fourth proportional to 657,861.17, 907,851.18 and 356,055.17 is: 491,357.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,861.17 : 907,851.18 = 356,055.17 : x
  2. Step 2: Convert to fraction form
    657,861.17/907,851.18 = 356,055.17/x
  3. Step 3: Cross multiply
    657,861.17x = 907,851.18 × 356,055.17
  4. Step 4: Simplify right side
    657,861.17x = 323,245,106,229.60
  5. Step 5: Solve for x
    x = 323,245,106,229.60/657,861.17
  6. Step 6: Final answer
    x = 491,357.63

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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.