Home / 579,318.60-868,977.90-391,312.20

Finding the Fourth Proportional to 579,318.60, 868,977.90 and 391,312.20

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Solution

The fourth proportional to 579,318.60, 868,977.90 and 391,312.20 is: 586,968.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,318.60 : 868,977.90 = 391,312.20 : x
  2. Step 2: Convert to fraction form
    579,318.60/868,977.90 = 391,312.20/x
  3. Step 3: Cross multiply
    579,318.60x = 868,977.90 × 391,312.20
  4. Step 4: Simplify right side
    579,318.60x = 340,041,653,800.38
  5. Step 5: Solve for x
    x = 340,041,653,800.38/579,318.60
  6. Step 6: Final answer
    x = 586,968.30

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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.