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Finding the Fourth Proportional to 539,785.20, 808,381.80 and 289,916.40

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Solution

The fourth proportional to 539,785.20, 808,381.80 and 289,916.40 is: 434,178.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,785.20 : 808,381.80 = 289,916.40 : x
  2. Step 2: Convert to fraction form
    539,785.20/808,381.80 = 289,916.40/x
  3. Step 3: Cross multiply
    539,785.20x = 808,381.80 × 289,916.40
  4. Step 4: Simplify right side
    539,785.20x = 234,363,141,281.52
  5. Step 5: Solve for x
    x = 234,363,141,281.52/539,785.20
  6. Step 6: Final answer
    x = 434,178.52

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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.