Home / 742,147.80-1,113,221.70-442,966.20

Finding the Fourth Proportional to 742,147.80, 1,113,221.70 and 442,966.20

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Solution

The fourth proportional to 742,147.80, 1,113,221.70 and 442,966.20 is: 664,449.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,147.80 : 1,113,221.70 = 442,966.20 : x
  2. Step 2: Convert to fraction form
    742,147.80/1,113,221.70 = 442,966.20/x
  3. Step 3: Cross multiply
    742,147.80x = 1,113,221.70 × 442,966.20
  4. Step 4: Simplify right side
    742,147.80x = 493,119,586,206.54
  5. Step 5: Solve for x
    x = 493,119,586,206.54/742,147.80
  6. Step 6: Final answer
    x = 664,449.30

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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.