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Finding the Fourth Proportional to 530,785.59, 732,479.01 and 289,072.20

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Solution

The fourth proportional to 530,785.59, 732,479.01 and 289,072.20 is: 398,916.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,785.59 : 732,479.01 = 289,072.20 : x
  2. Step 2: Convert to fraction form
    530,785.59/732,479.01 = 289,072.20/x
  3. Step 3: Cross multiply
    530,785.59x = 732,479.01 × 289,072.20
  4. Step 4: Simplify right side
    530,785.59x = 211,739,318,874.52
  5. Step 5: Solve for x
    x = 211,739,318,874.52/530,785.59
  6. Step 6: Final answer
    x = 398,916.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.