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Finding the Fourth Proportional to 639,191.18, 959,153.10 and 260,041.93

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Solution

The fourth proportional to 639,191.18, 959,153.10 and 260,041.93 is: 390,211.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,191.18 : 959,153.10 = 260,041.93 : x
  2. Step 2: Convert to fraction form
    639,191.18/959,153.10 = 260,041.93/x
  3. Step 3: Cross multiply
    639,191.18x = 959,153.10 × 260,041.93
  4. Step 4: Simplify right side
    639,191.18x = 249,420,020,891.60
  5. Step 5: Solve for x
    x = 249,420,020,891.60/639,191.18
  6. Step 6: Final answer
    x = 390,211.92

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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.