Home / 743,877.60-1,115,816.40-389,000.40

Finding the Fourth Proportional to 743,877.60, 1,115,816.40 and 389,000.40

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Solution

The fourth proportional to 743,877.60, 1,115,816.40 and 389,000.40 is: 583,500.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,877.60 : 1,115,816.40 = 389,000.40 : x
  2. Step 2: Convert to fraction form
    743,877.60/1,115,816.40 = 389,000.40/x
  3. Step 3: Cross multiply
    743,877.60x = 1,115,816.40 × 389,000.40
  4. Step 4: Simplify right side
    743,877.60x = 434,053,025,926.56
  5. Step 5: Solve for x
    x = 434,053,025,926.56/743,877.60
  6. Step 6: Final answer
    x = 583,500.60

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Double scale
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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.