Home / 769,760.20-1,154,640.30-390,534.40

Finding the Fourth Proportional to 769,760.20, 1,154,640.30 and 390,534.40

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Solution

The fourth proportional to 769,760.20, 1,154,640.30 and 390,534.40 is: 585,801.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,760.20 : 1,154,640.30 = 390,534.40 : x
  2. Step 2: Convert to fraction form
    769,760.20/1,154,640.30 = 390,534.40/x
  3. Step 3: Cross multiply
    769,760.20x = 1,154,640.30 × 390,534.40
  4. Step 4: Simplify right side
    769,760.20x = 450,926,756,776.32
  5. Step 5: Solve for x
    x = 450,926,756,776.32/769,760.20
  6. Step 6: Final answer
    x = 585,801.60

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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.