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Finding the Fourth Proportional to 358,903.40, 538,311.90 and 148,519.40

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Solution

The fourth proportional to 358,903.40, 538,311.90 and 148,519.40 is: 222,761.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,903.40 : 538,311.90 = 148,519.40 : x
  2. Step 2: Convert to fraction form
    358,903.40/538,311.90 = 148,519.40/x
  3. Step 3: Cross multiply
    358,903.40x = 538,311.90 × 148,519.40
  4. Step 4: Simplify right side
    358,903.40x = 79,949,760,400.86
  5. Step 5: Solve for x
    x = 79,949,760,400.86/358,903.40
  6. Step 6: Final answer
    x = 222,761.22

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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.