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Finding the Fourth Proportional to 656,928.80, 985,425.60 and 342,000.80

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Solution

The fourth proportional to 656,928.80, 985,425.60 and 342,000.80 is: 513,018.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,928.80 : 985,425.60 = 342,000.80 : x
  2. Step 2: Convert to fraction form
    656,928.80/985,425.60 = 342,000.80/x
  3. Step 3: Cross multiply
    656,928.80x = 985,425.60 × 342,000.80
  4. Step 4: Simplify right side
    656,928.80x = 337,016,343,540.48
  5. Step 5: Solve for x
    x = 337,016,343,540.48/656,928.80
  6. Step 6: Final answer
    x = 513,018.07

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1.5x scale

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.