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Finding the Fourth Proportional to 937.90, 1,292.93 and 657.29

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Solution

The fourth proportional to 937.90, 1,292.93 and 657.29 is: 906.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.90 : 1,292.93 = 657.29 : x
  2. Step 2: Convert to fraction form
    937.90/1,292.93 = 657.29/x
  3. Step 3: Cross multiply
    937.90x = 1,292.93 × 657.29
  4. Step 4: Simplify right side
    937.90x = 849,829.99
  5. Step 5: Solve for x
    x = 849,829.99/937.90
  6. Step 6: Final answer
    x = 906.10

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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.