Home / 764,139.10-1,146,208.65-409,845.10

Finding the Fourth Proportional to 764,139.10, 1,146,208.65 and 409,845.10

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Solution

The fourth proportional to 764,139.10, 1,146,208.65 and 409,845.10 is: 614,767.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,139.10 : 1,146,208.65 = 409,845.10 : x
  2. Step 2: Convert to fraction form
    764,139.10/1,146,208.65 = 409,845.10/x
  3. Step 3: Cross multiply
    764,139.10x = 1,146,208.65 × 409,845.10
  4. Step 4: Simplify right side
    764,139.10x = 469,767,998,780.12
  5. Step 5: Solve for x
    x = 469,767,998,780.12/764,139.10
  6. Step 6: Final answer
    x = 614,767.65

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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.