Home / 759,140.80-1,138,711.20-309,712.30

Finding the Fourth Proportional to 759,140.80, 1,138,711.20 and 309,712.30

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Solution

The fourth proportional to 759,140.80, 1,138,711.20 and 309,712.30 is: 464,568.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    759,140.80 : 1,138,711.20 = 309,712.30 : x
  2. Step 2: Convert to fraction form
    759,140.80/1,138,711.20 = 309,712.30/x
  3. Step 3: Cross multiply
    759,140.80x = 1,138,711.20 × 309,712.30
  4. Step 4: Simplify right side
    759,140.80x = 352,672,864,787.76
  5. Step 5: Solve for x
    x = 352,672,864,787.76/759,140.80
  6. Step 6: Final answer
    x = 464,568.45

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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.