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Finding the Fourth Proportional to 460.12, 685.79 and 434.18

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Solution

The fourth proportional to 460.12, 685.79 and 434.18 is: 647.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.12 : 685.79 = 434.18 : x
  2. Step 2: Convert to fraction form
    460.12/685.79 = 434.18/x
  3. Step 3: Cross multiply
    460.12x = 685.79 × 434.18
  4. Step 4: Simplify right side
    460.12x = 297,753.96
  5. Step 5: Solve for x
    x = 297,753.96/460.12
  6. Step 6: Final answer
    x = 647.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.