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Finding the Fourth Proportional to 911,847.48, 1,258,353.71 and 498,392.77

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Solution

The fourth proportional to 911,847.48, 1,258,353.71 and 498,392.77 is: 687,784.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,847.48 : 1,258,353.71 = 498,392.77 : x
  2. Step 2: Convert to fraction form
    911,847.48/1,258,353.71 = 498,392.77/x
  3. Step 3: Cross multiply
    911,847.48x = 1,258,353.71 × 498,392.77
  4. Step 4: Simplify right side
    911,847.48x = 627,154,391,894.61
  5. Step 5: Solve for x
    x = 627,154,391,894.61/911,847.48
  6. Step 6: Final answer
    x = 687,784.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.