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Finding the Fourth Proportional to 318,402.97, 439,147.34 and 197,476.45

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Solution

The fourth proportional to 318,402.97, 439,147.34 and 197,476.45 is: 272,363.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,402.97 : 439,147.34 = 197,476.45 : x
  2. Step 2: Convert to fraction form
    318,402.97/439,147.34 = 197,476.45/x
  3. Step 3: Cross multiply
    318,402.97x = 439,147.34 × 197,476.45
  4. Step 4: Simplify right side
    318,402.97x = 86,721,255,534.41
  5. Step 5: Solve for x
    x = 86,721,255,534.41/318,402.97
  6. Step 6: Final answer
    x = 272,363.22

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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.