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Finding the Fourth Proportional to 986,709.20, 1,361,658.80 and 534,000.20

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Solution

The fourth proportional to 986,709.20, 1,361,658.80 and 534,000.20 is: 736,920.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,709.20 : 1,361,658.80 = 534,000.20 : x
  2. Step 2: Convert to fraction form
    986,709.20/1,361,658.80 = 534,000.20/x
  3. Step 3: Cross multiply
    986,709.20x = 1,361,658.80 × 534,000.20
  4. Step 4: Simplify right side
    986,709.20x = 727,126,071,531.76
  5. Step 5: Solve for x
    x = 727,126,071,531.76/986,709.20
  6. Step 6: Final answer
    x = 736,920.33

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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.