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Finding the Fourth Proportional to 612,103.80, 918,155.70 and 191,508.60

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Solution

The fourth proportional to 612,103.80, 918,155.70 and 191,508.60 is: 287,262.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,103.80 : 918,155.70 = 191,508.60 : x
  2. Step 2: Convert to fraction form
    612,103.80/918,155.70 = 191,508.60/x
  3. Step 3: Cross multiply
    612,103.80x = 918,155.70 × 191,508.60
  4. Step 4: Simplify right side
    612,103.80x = 175,834,712,689.02
  5. Step 5: Solve for x
    x = 175,834,712,689.02/612,103.80
  6. Step 6: Final answer
    x = 287,262.90

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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.