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Finding the Fourth Proportional to 662,947.80, 994,421.70 and 411,005.40

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Solution

The fourth proportional to 662,947.80, 994,421.70 and 411,005.40 is: 616,508.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,947.80 : 994,421.70 = 411,005.40 : x
  2. Step 2: Convert to fraction form
    662,947.80/994,421.70 = 411,005.40/x
  3. Step 3: Cross multiply
    662,947.80x = 994,421.70 × 411,005.40
  4. Step 4: Simplify right side
    662,947.80x = 408,712,688,577.18
  5. Step 5: Solve for x
    x = 408,712,688,577.18/662,947.80
  6. Step 6: Final answer
    x = 616,508.10

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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.