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Finding the Fourth Proportional to 749.92, 1,125.12 and 507.36

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Solution

The fourth proportional to 749.92, 1,125.12 and 507.36 is: 761.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.92 : 1,125.12 = 507.36 : x
  2. Step 2: Convert to fraction form
    749.92/1,125.12 = 507.36/x
  3. Step 3: Cross multiply
    749.92x = 1,125.12 × 507.36
  4. Step 4: Simplify right side
    749.92x = 570,840.88
  5. Step 5: Solve for x
    x = 570,840.88/749.92
  6. Step 6: Final answer
    x = 761.20

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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.