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Finding the Fourth Proportional to 750.47, 1,035.68 and 455.76

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Solution

The fourth proportional to 750.47, 1,035.68 and 455.76 is: 628.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.47 : 1,035.68 = 455.76 : x
  2. Step 2: Convert to fraction form
    750.47/1,035.68 = 455.76/x
  3. Step 3: Cross multiply
    750.47x = 1,035.68 × 455.76
  4. Step 4: Simplify right side
    750.47x = 472,019.24
  5. Step 5: Solve for x
    x = 472,019.24/750.47
  6. Step 6: Final answer
    x = 628.97

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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.