Home / 762,139.60-1,143,209.40-638,136.70

Finding the Fourth Proportional to 762,139.60, 1,143,209.40 and 638,136.70

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Solution

The fourth proportional to 762,139.60, 1,143,209.40 and 638,136.70 is: 957,205.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    762,139.60 : 1,143,209.40 = 638,136.70 : x
  2. Step 2: Convert to fraction form
    762,139.60/1,143,209.40 = 638,136.70/x
  3. Step 3: Cross multiply
    762,139.60x = 1,143,209.40 × 638,136.70
  4. Step 4: Simplify right side
    762,139.60x = 729,523,873,924.98
  5. Step 5: Solve for x
    x = 729,523,873,924.98/762,139.60
  6. Step 6: Final answer
    x = 957,205.05

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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.