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Finding the Fourth Proportional to 371,385.89, 512,514.63 and 218,430.53

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Solution

The fourth proportional to 371,385.89, 512,514.63 and 218,430.53 is: 301,435.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,385.89 : 512,514.63 = 218,430.53 : x
  2. Step 2: Convert to fraction form
    371,385.89/512,514.63 = 218,430.53/x
  3. Step 3: Cross multiply
    371,385.89x = 512,514.63 × 218,430.53
  4. Step 4: Simplify right side
    371,385.89x = 111,948,842,174.42
  5. Step 5: Solve for x
    x = 111,948,842,174.42/371,385.89
  6. Step 6: Final answer
    x = 301,435.36

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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.