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Finding the Fourth Proportional to 279,079.40, 418,619.10 and 160,981.40

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Solution

The fourth proportional to 279,079.40, 418,619.10 and 160,981.40 is: 241,472.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,079.40 : 418,619.10 = 160,981.40 : x
  2. Step 2: Convert to fraction form
    279,079.40/418,619.10 = 160,981.40/x
  3. Step 3: Cross multiply
    279,079.40x = 418,619.10 × 160,981.40
  4. Step 4: Simplify right side
    279,079.40x = 67,389,888,784.74
  5. Step 5: Solve for x
    x = 67,389,888,784.74/279,079.40
  6. Step 6: Final answer
    x = 241,472.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.