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Finding the Fourth Proportional to 1,020.60, 1,528.82 and 472.02

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Solution

The fourth proportional to 1,020.60, 1,528.82 and 472.02 is: 707.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.60 : 1,528.82 = 472.02 : x
  2. Step 2: Convert to fraction form
    1,020.60/1,528.82 = 472.02/x
  3. Step 3: Cross multiply
    1,020.60x = 1,528.82 × 472.02
  4. Step 4: Simplify right side
    1,020.60x = 721,633.62
  5. Step 5: Solve for x
    x = 721,633.62/1,020.60
  6. Step 6: Final answer
    x = 707.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.