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Finding the Fourth Proportional to 870.06, 1,200.87 and 497.10

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Solution

The fourth proportional to 870.06, 1,200.87 and 497.10 is: 686.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    870.06 : 1,200.87 = 497.10 : x
  2. Step 2: Convert to fraction form
    870.06/1,200.87 = 497.10/x
  3. Step 3: Cross multiply
    870.06x = 1,200.87 × 497.10
  4. Step 4: Simplify right side
    870.06x = 596,952.48
  5. Step 5: Solve for x
    x = 596,952.48/870.06
  6. Step 6: Final answer
    x = 686.10

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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.