Home / 890,341.20-1,335,511.80-291,321.90

Finding the Fourth Proportional to 890,341.20, 1,335,511.80 and 291,321.90

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Solution

The fourth proportional to 890,341.20, 1,335,511.80 and 291,321.90 is: 436,982.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,341.20 : 1,335,511.80 = 291,321.90 : x
  2. Step 2: Convert to fraction form
    890,341.20/1,335,511.80 = 291,321.90/x
  3. Step 3: Cross multiply
    890,341.20x = 1,335,511.80 × 291,321.90
  4. Step 4: Simplify right side
    890,341.20x = 389,063,835,048.42
  5. Step 5: Solve for x
    x = 389,063,835,048.42/890,341.20
  6. Step 6: Final answer
    x = 436,982.85

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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.