Home / 442,899.60-664,349.40-431,235.60

Finding the Fourth Proportional to 442,899.60, 664,349.40 and 431,235.60

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Solution

The fourth proportional to 442,899.60, 664,349.40 and 431,235.60 is: 646,853.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,899.60 : 664,349.40 = 431,235.60 : x
  2. Step 2: Convert to fraction form
    442,899.60/664,349.40 = 431,235.60/x
  3. Step 3: Cross multiply
    442,899.60x = 664,349.40 × 431,235.60
  4. Step 4: Simplify right side
    442,899.60x = 286,491,112,118.64
  5. Step 5: Solve for x
    x = 286,491,112,118.64/442,899.60
  6. Step 6: Final answer
    x = 646,853.40

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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.