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Finding the Fourth Proportional to 870.01, 1,200.45 and 575.11

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Solution

The fourth proportional to 870.01, 1,200.45 and 575.11 is: 793.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    870.01 : 1,200.45 = 575.11 : x
  2. Step 2: Convert to fraction form
    870.01/1,200.45 = 575.11/x
  3. Step 3: Cross multiply
    870.01x = 1,200.45 × 575.11
  4. Step 4: Simplify right side
    870.01x = 690,394.46
  5. Step 5: Solve for x
    x = 690,394.46/870.01
  6. Step 6: Final answer
    x = 793.55

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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.