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Finding the Fourth Proportional to 499.47, 689.09 and 425.04

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Solution

The fourth proportional to 499.47, 689.09 and 425.04 is: 586.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.47 : 689.09 = 425.04 : x
  2. Step 2: Convert to fraction form
    499.47/689.09 = 425.04/x
  3. Step 3: Cross multiply
    499.47x = 689.09 × 425.04
  4. Step 4: Simplify right side
    499.47x = 292,888.69
  5. Step 5: Solve for x
    x = 292,888.69/499.47
  6. Step 6: Final answer
    x = 586.40

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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.