Home / 670,207.60-1,005,311.40-639,103.60

Finding the Fourth Proportional to 670,207.60, 1,005,311.40 and 639,103.60

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Solution

The fourth proportional to 670,207.60, 1,005,311.40 and 639,103.60 is: 958,655.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,207.60 : 1,005,311.40 = 639,103.60 : x
  2. Step 2: Convert to fraction form
    670,207.60/1,005,311.40 = 639,103.60/x
  3. Step 3: Cross multiply
    670,207.60x = 1,005,311.40 × 639,103.60
  4. Step 4: Simplify right side
    670,207.60x = 642,498,134,861.04
  5. Step 5: Solve for x
    x = 642,498,134,861.04/670,207.60
  6. Step 6: Final answer
    x = 958,655.40

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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.