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Finding the Fourth Proportional to 371,390.15, 512,520.50 and 218,434.79

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Solution

The fourth proportional to 371,390.15, 512,520.50 and 218,434.79 is: 301,441.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,390.15 : 512,520.50 = 218,434.79 : x
  2. Step 2: Convert to fraction form
    371,390.15/512,520.50 = 218,434.79/x
  3. Step 3: Cross multiply
    371,390.15x = 512,520.50 × 218,434.79
  4. Step 4: Simplify right side
    371,390.15x = 111,952,307,788.20
  5. Step 5: Solve for x
    x = 111,952,307,788.20/371,390.15
  6. Step 6: Final answer
    x = 301,441.24

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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.