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Finding the Fourth Proportional to 982.12, 1,472.94 and 707.40

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Solution

The fourth proportional to 982.12, 1,472.94 and 707.40 is: 1,060.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.12 : 1,472.94 = 707.40 : x
  2. Step 2: Convert to fraction form
    982.12/1,472.94 = 707.40/x
  3. Step 3: Cross multiply
    982.12x = 1,472.94 × 707.40
  4. Step 4: Simplify right side
    982.12x = 1,041,957.76
  5. Step 5: Solve for x
    x = 1,041,957.76/982.12
  6. Step 6: Final answer
    x = 1,060.93

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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.