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Finding the Fourth Proportional to 758.18, 1,046.40 and 463.40

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Solution

The fourth proportional to 758.18, 1,046.40 and 463.40 is: 639.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.18 : 1,046.40 = 463.40 : x
  2. Step 2: Convert to fraction form
    758.18/1,046.40 = 463.40/x
  3. Step 3: Cross multiply
    758.18x = 1,046.40 × 463.40
  4. Step 4: Simplify right side
    758.18x = 484,901.76
  5. Step 5: Solve for x
    x = 484,901.76/758.18
  6. Step 6: Final answer
    x = 639.56

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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.