Home / 657,979.20-986,968.80-342,395.10

Finding the Fourth Proportional to 657,979.20, 986,968.80 and 342,395.10

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Solution

The fourth proportional to 657,979.20, 986,968.80 and 342,395.10 is: 513,592.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,979.20 : 986,968.80 = 342,395.10 : x
  2. Step 2: Convert to fraction form
    657,979.20/986,968.80 = 342,395.10/x
  3. Step 3: Cross multiply
    657,979.20x = 986,968.80 × 342,395.10
  4. Step 4: Simplify right side
    657,979.20x = 337,933,280,972.88
  5. Step 5: Solve for x
    x = 337,933,280,972.88/657,979.20
  6. Step 6: Final answer
    x = 513,592.65

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Double scale
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Similar ratio
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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.