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Finding the Fourth Proportional to 528,430.80, 792,646.20 and 247,976.40

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Solution

The fourth proportional to 528,430.80, 792,646.20 and 247,976.40 is: 371,964.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,430.80 : 792,646.20 = 247,976.40 : x
  2. Step 2: Convert to fraction form
    528,430.80/792,646.20 = 247,976.40/x
  3. Step 3: Cross multiply
    528,430.80x = 792,646.20 × 247,976.40
  4. Step 4: Simplify right side
    528,430.80x = 196,557,551,149.68
  5. Step 5: Solve for x
    x = 196,557,551,149.68/528,430.80
  6. Step 6: Final answer
    x = 371,964.60

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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.