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Finding the Fourth Proportional to 658,009.20, 985,701.60 and 342,643.80

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Solution

The fourth proportional to 658,009.20, 985,701.60 and 342,643.80 is: 513,282.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,009.20 : 985,701.60 = 342,643.80 : x
  2. Step 2: Convert to fraction form
    658,009.20/985,701.60 = 342,643.80/x
  3. Step 3: Cross multiply
    658,009.20x = 985,701.60 × 342,643.80
  4. Step 4: Simplify right side
    658,009.20x = 337,744,541,890.08
  5. Step 5: Solve for x
    x = 337,744,541,890.08/658,009.20
  6. Step 6: Final answer
    x = 513,282.40

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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.