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Finding the Fourth Proportional to 657,436.52, 907,266.66 and 385,443.56

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Solution

The fourth proportional to 657,436.52, 907,266.66 and 385,443.56 is: 531,914.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,436.52 : 907,266.66 = 385,443.56 : x
  2. Step 2: Convert to fraction form
    657,436.52/907,266.66 = 385,443.56/x
  3. Step 3: Cross multiply
    657,436.52x = 907,266.66 × 385,443.56
  4. Step 4: Simplify right side
    657,436.52x = 349,700,091,299.71
  5. Step 5: Solve for x
    x = 349,700,091,299.71/657,436.52
  6. Step 6: Final answer
    x = 531,914.61

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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.