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Finding the Fourth Proportional to 937.01, 1,291.35 and 621.71

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Solution

The fourth proportional to 937.01, 1,291.35 and 621.71 is: 856.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.01 : 1,291.35 = 621.71 : x
  2. Step 2: Convert to fraction form
    937.01/1,291.35 = 621.71/x
  3. Step 3: Cross multiply
    937.01x = 1,291.35 × 621.71
  4. Step 4: Simplify right side
    937.01x = 802,850.77
  5. Step 5: Solve for x
    x = 802,850.77/937.01
  6. Step 6: Final answer
    x = 856.83

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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.