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Finding the Fourth Proportional to 1,037.48, 1,430.87 and 742.91

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Solution

The fourth proportional to 1,037.48, 1,430.87 and 742.91 is: 1,024.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,037.48 : 1,430.87 = 742.91 : x
  2. Step 2: Convert to fraction form
    1,037.48/1,430.87 = 742.91/x
  3. Step 3: Cross multiply
    1,037.48x = 1,430.87 × 742.91
  4. Step 4: Simplify right side
    1,037.48x = 1,062,996.76
  5. Step 5: Solve for x
    x = 1,062,996.76/1,037.48
  6. Step 6: Final answer
    x = 1,024.60

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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.