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Finding the Fourth Proportional to 612,976.60, 917,715.30 and 542,992.60

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Solution

The fourth proportional to 612,976.60, 917,715.30 and 542,992.60 is: 812,939.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,976.60 : 917,715.30 = 542,992.60 : x
  2. Step 2: Convert to fraction form
    612,976.60/917,715.30 = 542,992.60/x
  3. Step 3: Cross multiply
    612,976.60x = 917,715.30 × 542,992.60
  4. Step 4: Simplify right side
    612,976.60x = 498,312,616,806.78
  5. Step 5: Solve for x
    x = 498,312,616,806.78/612,976.60
  6. Step 6: Final answer
    x = 812,939.05

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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.