Home / 672,088.60-1,008,132.90-639,429.40

Finding the Fourth Proportional to 672,088.60, 1,008,132.90 and 639,429.40

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Solution

The fourth proportional to 672,088.60, 1,008,132.90 and 639,429.40 is: 959,144.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,088.60 : 1,008,132.90 = 639,429.40 : x
  2. Step 2: Convert to fraction form
    672,088.60/1,008,132.90 = 639,429.40/x
  3. Step 3: Cross multiply
    672,088.60x = 1,008,132.90 × 639,429.40
  4. Step 4: Simplify right side
    672,088.60x = 644,629,815,367.26
  5. Step 5: Solve for x
    x = 644,629,815,367.26/672,088.60
  6. Step 6: Final answer
    x = 959,144.10

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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.