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Finding the Fourth Proportional to 731.02, 1,009.54 and 625.50

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Solution

The fourth proportional to 731.02, 1,009.54 and 625.50 is: 863.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    731.02 : 1,009.54 = 625.50 : x
  2. Step 2: Convert to fraction form
    731.02/1,009.54 = 625.50/x
  3. Step 3: Cross multiply
    731.02x = 1,009.54 × 625.50
  4. Step 4: Simplify right side
    731.02x = 631,467.27
  5. Step 5: Solve for x
    x = 631,467.27/731.02
  6. Step 6: Final answer
    x = 863.82

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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.