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Finding the Fourth Proportional to 688.23, 1,030.14 and 482.18

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Solution

The fourth proportional to 688.23, 1,030.14 and 482.18 is: 721.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.23 : 1,030.14 = 482.18 : x
  2. Step 2: Convert to fraction form
    688.23/1,030.14 = 482.18/x
  3. Step 3: Cross multiply
    688.23x = 1,030.14 × 482.18
  4. Step 4: Simplify right side
    688.23x = 496,707.75
  5. Step 5: Solve for x
    x = 496,707.75/688.23
  6. Step 6: Final answer
    x = 721.72

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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.