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Finding the Fourth Proportional to 279,695.43, 385,968.29 and 170,981.79

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Solution

The fourth proportional to 279,695.43, 385,968.29 and 170,981.79 is: 235,947.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,695.43 : 385,968.29 = 170,981.79 : x
  2. Step 2: Convert to fraction form
    279,695.43/385,968.29 = 170,981.79/x
  3. Step 3: Cross multiply
    279,695.43x = 385,968.29 × 170,981.79
  4. Step 4: Simplify right side
    279,695.43x = 65,993,547,766.92
  5. Step 5: Solve for x
    x = 65,993,547,766.92/279,695.43
  6. Step 6: Final answer
    x = 235,947.89

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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.