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Finding the Fourth Proportional to 657.78, 907.72 and 424.91

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Solution

The fourth proportional to 657.78, 907.72 and 424.91 is: 586.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.78 : 907.72 = 424.91 : x
  2. Step 2: Convert to fraction form
    657.78/907.72 = 424.91/x
  3. Step 3: Cross multiply
    657.78x = 907.72 × 424.91
  4. Step 4: Simplify right side
    657.78x = 385,699.31
  5. Step 5: Solve for x
    x = 385,699.31/657.78
  6. Step 6: Final answer
    x = 586.37

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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.