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Finding the Fourth Proportional to 735.15, 1,013.61 and 647.46

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Solution

The fourth proportional to 735.15, 1,013.61 and 647.46 is: 892.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.15 : 1,013.61 = 647.46 : x
  2. Step 2: Convert to fraction form
    735.15/1,013.61 = 647.46/x
  3. Step 3: Cross multiply
    735.15x = 1,013.61 × 647.46
  4. Step 4: Simplify right side
    735.15x = 656,271.93
  5. Step 5: Solve for x
    x = 656,271.93/735.15
  6. Step 6: Final answer
    x = 892.70

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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.