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Finding the Fourth Proportional to 657.47, 907.31 and 377.72

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Solution

The fourth proportional to 657.47, 907.31 and 377.72 is: 521.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.47 : 907.31 = 377.72 : x
  2. Step 2: Convert to fraction form
    657.47/907.31 = 377.72/x
  3. Step 3: Cross multiply
    657.47x = 907.31 × 377.72
  4. Step 4: Simplify right side
    657.47x = 342,702.71
  5. Step 5: Solve for x
    x = 342,702.71/657.47
  6. Step 6: Final answer
    x = 521.25

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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.