Home / 859,138.60-1,288,707.90-433,985.80

Finding the Fourth Proportional to 859,138.60, 1,288,707.90 and 433,985.80

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Solution

The fourth proportional to 859,138.60, 1,288,707.90 and 433,985.80 is: 650,978.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,138.60 : 1,288,707.90 = 433,985.80 : x
  2. Step 2: Convert to fraction form
    859,138.60/1,288,707.90 = 433,985.80/x
  3. Step 3: Cross multiply
    859,138.60x = 1,288,707.90 × 433,985.80
  4. Step 4: Simplify right side
    859,138.60x = 559,280,928,947.82
  5. Step 5: Solve for x
    x = 559,280,928,947.82/859,138.60
  6. Step 6: Final answer
    x = 650,978.70

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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.