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Finding the Fourth Proportional to 486,016.40, 729,024.60 and 459,772.40

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Solution

The fourth proportional to 486,016.40, 729,024.60 and 459,772.40 is: 689,658.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,016.40 : 729,024.60 = 459,772.40 : x
  2. Step 2: Convert to fraction form
    486,016.40/729,024.60 = 459,772.40/x
  3. Step 3: Cross multiply
    486,016.40x = 729,024.60 × 459,772.40
  4. Step 4: Simplify right side
    486,016.40x = 335,185,390,001.04
  5. Step 5: Solve for x
    x = 335,185,390,001.04/486,016.40
  6. Step 6: Final answer
    x = 689,658.60

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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.