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Finding the Fourth Proportional to 870.34, 1,201.15 and 497.44

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Solution

The fourth proportional to 870.34, 1,201.15 and 497.44 is: 686.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    870.34 : 1,201.15 = 497.44 : x
  2. Step 2: Convert to fraction form
    870.34/1,201.15 = 497.44/x
  3. Step 3: Cross multiply
    870.34x = 1,201.15 × 497.44
  4. Step 4: Simplify right side
    870.34x = 597,500.31
  5. Step 5: Solve for x
    x = 597,500.31/870.34
  6. Step 6: Final answer
    x = 686.51

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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.