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Finding the Fourth Proportional to 1,024.72, 1,536 and 750.40

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Solution

The fourth proportional to 1,024.72, 1,536 and 750.40 is: 1,124.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,024.72 : 1,536 = 750.40 : x
  2. Step 2: Convert to fraction form
    1,024.72/1,536 = 750.40/x
  3. Step 3: Cross multiply
    1,024.72x = 1,536 × 750.40
  4. Step 4: Simplify right side
    1,024.72x = 1,152,614.40
  5. Step 5: Solve for x
    x = 1,152,614.40/1,024.72
  6. Step 6: Final answer
    x = 1,124.81

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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.