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Finding the Fourth Proportional to 538,139.38, 807,245.70 and 178,309.40

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Solution

The fourth proportional to 538,139.38, 807,245.70 and 178,309.40 is: 267,476.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,139.38 : 807,245.70 = 178,309.40 : x
  2. Step 2: Convert to fraction form
    538,139.38/807,245.70 = 178,309.40/x
  3. Step 3: Cross multiply
    538,139.38x = 807,245.70 × 178,309.40
  4. Step 4: Simplify right side
    538,139.38x = 143,939,496,419.58
  5. Step 5: Solve for x
    x = 143,939,496,419.58/538,139.38
  6. Step 6: Final answer
    x = 267,476.24

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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.