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Finding the Fourth Proportional to 520,065.70, 780,098.55 and 459,931.30

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Solution

The fourth proportional to 520,065.70, 780,098.55 and 459,931.30 is: 689,896.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,065.70 : 780,098.55 = 459,931.30 : x
  2. Step 2: Convert to fraction form
    520,065.70/780,098.55 = 459,931.30/x
  3. Step 3: Cross multiply
    520,065.70x = 780,098.55 × 459,931.30
  4. Step 4: Simplify right side
    520,065.70x = 358,791,740,229.62
  5. Step 5: Solve for x
    x = 358,791,740,229.62/520,065.70
  6. Step 6: Final answer
    x = 689,896.95

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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.