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Finding the Fourth Proportional to 641,712.80, 962,569.20 and 607,498.40

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Solution

The fourth proportional to 641,712.80, 962,569.20 and 607,498.40 is: 911,247.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,712.80 : 962,569.20 = 607,498.40 : x
  2. Step 2: Convert to fraction form
    641,712.80/962,569.20 = 607,498.40/x
  3. Step 3: Cross multiply
    641,712.80x = 962,569.20 × 607,498.40
  4. Step 4: Simplify right side
    641,712.80x = 584,759,248,889.28
  5. Step 5: Solve for x
    x = 584,759,248,889.28/641,712.80
  6. Step 6: Final answer
    x = 911,247.60

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Double scale
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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.