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Finding the Fourth Proportional to 371,785.68, 513,108 and 220,882.80

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Solution

The fourth proportional to 371,785.68, 513,108 and 220,882.80 is: 304,844.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,785.68 : 513,108 = 220,882.80 : x
  2. Step 2: Convert to fraction form
    371,785.68/513,108 = 220,882.80/x
  3. Step 3: Cross multiply
    371,785.68x = 513,108 × 220,882.80
  4. Step 4: Simplify right side
    371,785.68x = 113,336,731,742.40
  5. Step 5: Solve for x
    x = 113,336,731,742.40/371,785.68
  6. Step 6: Final answer
    x = 304,844.26

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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.