Home / 761,641.60-1,051,065.38-422,131.72

Finding the Fourth Proportional to 761,641.60, 1,051,065.38 and 422,131.72

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Solution

The fourth proportional to 761,641.60, 1,051,065.38 and 422,131.72 is: 582,541.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,641.60 : 1,051,065.38 = 422,131.72 : x
  2. Step 2: Convert to fraction form
    761,641.60/1,051,065.38 = 422,131.72/x
  3. Step 3: Cross multiply
    761,641.60x = 1,051,065.38 × 422,131.72
  4. Step 4: Simplify right side
    761,641.60x = 443,688,036,691.85
  5. Step 5: Solve for x
    x = 443,688,036,691.85/761,641.60
  6. Step 6: Final answer
    x = 582,541.76

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.