Home / 781,365.40-1,172,048.10-539,920.60

Finding the Fourth Proportional to 781,365.40, 1,172,048.10 and 539,920.60

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Solution

The fourth proportional to 781,365.40, 1,172,048.10 and 539,920.60 is: 809,880.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,365.40 : 1,172,048.10 = 539,920.60 : x
  2. Step 2: Convert to fraction form
    781,365.40/1,172,048.10 = 539,920.60/x
  3. Step 3: Cross multiply
    781,365.40x = 1,172,048.10 × 539,920.60
  4. Step 4: Simplify right side
    781,365.40x = 632,812,913,380.86
  5. Step 5: Solve for x
    x = 632,812,913,380.86/781,365.40
  6. Step 6: Final answer
    x = 809,880.90

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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.