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Finding the Fourth Proportional to 658,411.60, 987,617.40 and 651,413.20

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Solution

The fourth proportional to 658,411.60, 987,617.40 and 651,413.20 is: 977,119.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,411.60 : 987,617.40 = 651,413.20 : x
  2. Step 2: Convert to fraction form
    658,411.60/987,617.40 = 651,413.20/x
  3. Step 3: Cross multiply
    658,411.60x = 987,617.40 × 651,413.20
  4. Step 4: Simplify right side
    658,411.60x = 643,347,010,909.68
  5. Step 5: Solve for x
    x = 643,347,010,909.68/658,411.60
  6. Step 6: Final answer
    x = 977,119.80

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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.