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Finding the Fourth Proportional to 521,651.62, 786,500.28 and 518,413.16

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Solution

The fourth proportional to 521,651.62, 786,500.28 and 518,413.16 is: 781,617.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,651.62 : 786,500.28 = 518,413.16 : x
  2. Step 2: Convert to fraction form
    521,651.62/786,500.28 = 518,413.16/x
  3. Step 3: Cross multiply
    521,651.62x = 786,500.28 × 518,413.16
  4. Step 4: Simplify right side
    521,651.62x = 407,732,097,461.94
  5. Step 5: Solve for x
    x = 407,732,097,461.94/521,651.62
  6. Step 6: Final answer
    x = 781,617.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.