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Finding the Fourth Proportional to 750.76, 1,035.93 and 455.92

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Solution

The fourth proportional to 750.76, 1,035.93 and 455.92 is: 629.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.76 : 1,035.93 = 455.92 : x
  2. Step 2: Convert to fraction form
    750.76/1,035.93 = 455.92/x
  3. Step 3: Cross multiply
    750.76x = 1,035.93 × 455.92
  4. Step 4: Simplify right side
    750.76x = 472,301.21
  5. Step 5: Solve for x
    x = 472,301.21/750.76
  6. Step 6: Final answer
    x = 629.10

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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.