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Finding the Fourth Proportional to 411,109.20, 616,939.20 and 144,870.30

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Solution

The fourth proportional to 411,109.20, 616,939.20 and 144,870.30 is: 217,402.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,109.20 : 616,939.20 = 144,870.30 : x
  2. Step 2: Convert to fraction form
    411,109.20/616,939.20 = 144,870.30/x
  3. Step 3: Cross multiply
    411,109.20x = 616,939.20 × 144,870.30
  4. Step 4: Simplify right side
    411,109.20x = 89,376,166,985.76
  5. Step 5: Solve for x
    x = 89,376,166,985.76/411,109.20
  6. Step 6: Final answer
    x = 217,402.50

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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.