Home / 890,998.20-1,336,497.30-291,978.90

Finding the Fourth Proportional to 890,998.20, 1,336,497.30 and 291,978.90

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Solution

The fourth proportional to 890,998.20, 1,336,497.30 and 291,978.90 is: 437,968.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    890,998.20 : 1,336,497.30 = 291,978.90 : x
  2. Step 2: Convert to fraction form
    890,998.20/1,336,497.30 = 291,978.90/x
  3. Step 3: Cross multiply
    890,998.20x = 1,336,497.30 × 291,978.90
  4. Step 4: Simplify right side
    890,998.20x = 390,229,011,506.97
  5. Step 5: Solve for x
    x = 390,229,011,506.97/890,998.20
  6. Step 6: Final answer
    x = 437,968.35

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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.