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Finding the Fourth Proportional to 937.31, 1,405.96 and 507.20

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Solution

The fourth proportional to 937.31, 1,405.96 and 507.20 is: 760.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.31 : 1,405.96 = 507.20 : x
  2. Step 2: Convert to fraction form
    937.31/1,405.96 = 507.20/x
  3. Step 3: Cross multiply
    937.31x = 1,405.96 × 507.20
  4. Step 4: Simplify right side
    937.31x = 713,100.67
  5. Step 5: Solve for x
    x = 713,100.67/937.31
  6. Step 6: Final answer
    x = 760.80

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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.