Home / 814,254.30-1,221,381.45-340,890.30

Finding the Fourth Proportional to 814,254.30, 1,221,381.45 and 340,890.30

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Solution

The fourth proportional to 814,254.30, 1,221,381.45 and 340,890.30 is: 511,335.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,254.30 : 1,221,381.45 = 340,890.30 : x
  2. Step 2: Convert to fraction form
    814,254.30/1,221,381.45 = 340,890.30/x
  3. Step 3: Cross multiply
    814,254.30x = 1,221,381.45 × 340,890.30
  4. Step 4: Simplify right side
    814,254.30x = 416,357,088,904.94
  5. Step 5: Solve for x
    x = 416,357,088,904.94/814,254.30
  6. Step 6: Final answer
    x = 511,335.45

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Half scale
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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.