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Finding the Fourth Proportional to 657,937.69, 907,956.74 and 356,131.69

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Solution

The fourth proportional to 657,937.69, 907,956.74 and 356,131.69 is: 491,463.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,937.69 : 907,956.74 = 356,131.69 : x
  2. Step 2: Convert to fraction form
    657,937.69/907,956.74 = 356,131.69/x
  3. Step 3: Cross multiply
    657,937.69x = 907,956.74 × 356,131.69
  4. Step 4: Simplify right side
    657,937.69x = 323,352,166,883.53
  5. Step 5: Solve for x
    x = 323,352,166,883.53/657,937.69
  6. Step 6: Final answer
    x = 491,463.21

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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.