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Finding the Fourth Proportional to 318,397.86, 439,278.66 and 197,495.64

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Solution

The fourth proportional to 318,397.86, 439,278.66 and 197,495.64 is: 272,475.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,397.86 : 439,278.66 = 197,495.64 : x
  2. Step 2: Convert to fraction form
    318,397.86/439,278.66 = 197,495.64/x
  3. Step 3: Cross multiply
    318,397.86x = 439,278.66 × 197,495.64
  4. Step 4: Simplify right side
    318,397.86x = 86,755,620,095.04
  5. Step 5: Solve for x
    x = 86,755,620,095.04/318,397.86
  6. Step 6: Final answer
    x = 272,475.51

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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.