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Finding the Fourth Proportional to 937.74, 1,404.63 and 521.25

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Solution

The fourth proportional to 937.74, 1,404.63 and 521.25 is: 780.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.74 : 1,404.63 = 521.25 : x
  2. Step 2: Convert to fraction form
    937.74/1,404.63 = 521.25/x
  3. Step 3: Cross multiply
    937.74x = 1,404.63 × 521.25
  4. Step 4: Simplify right side
    937.74x = 732,158.12
  5. Step 5: Solve for x
    x = 732,158.12/937.74
  6. Step 6: Final answer
    x = 780.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.