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Finding the Fourth Proportional to 731.18, 1,009.40 and 565.02

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Solution

The fourth proportional to 731.18, 1,009.40 and 565.02 is: 780.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.18 : 1,009.40 = 565.02 : x
  2. Step 2: Convert to fraction form
    731.18/1,009.40 = 565.02/x
  3. Step 3: Cross multiply
    731.18x = 1,009.40 × 565.02
  4. Step 4: Simplify right side
    731.18x = 570,331.19
  5. Step 5: Solve for x
    x = 570,331.19/731.18
  6. Step 6: Final answer
    x = 780.01

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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.