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Finding the Fourth Proportional to 750.40, 1,035.68 and 529.12

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Solution

The fourth proportional to 750.40, 1,035.68 and 529.12 is: 730.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.40 : 1,035.68 = 529.12 : x
  2. Step 2: Convert to fraction form
    750.40/1,035.68 = 529.12/x
  3. Step 3: Cross multiply
    750.40x = 1,035.68 × 529.12
  4. Step 4: Simplify right side
    750.40x = 547,999.00
  5. Step 5: Solve for x
    x = 547,999.00/750.40
  6. Step 6: Final answer
    x = 730.28

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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.