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Finding the Fourth Proportional to 731.68, 1,009.84 and 436.96

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Solution

The fourth proportional to 731.68, 1,009.84 and 436.96 is: 603.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.68 : 1,009.84 = 436.96 : x
  2. Step 2: Convert to fraction form
    731.68/1,009.84 = 436.96/x
  3. Step 3: Cross multiply
    731.68x = 1,009.84 × 436.96
  4. Step 4: Simplify right side
    731.68x = 441,259.69
  5. Step 5: Solve for x
    x = 441,259.69/731.68
  6. Step 6: Final answer
    x = 603.08

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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.