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Finding the Fourth Proportional to 279,387.68, 385,555.02 and 152,064.20

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Solution

The fourth proportional to 279,387.68, 385,555.02 and 152,064.20 is: 209,848.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,387.68 : 385,555.02 = 152,064.20 : x
  2. Step 2: Convert to fraction form
    279,387.68/385,555.02 = 152,064.20/x
  3. Step 3: Cross multiply
    279,387.68x = 385,555.02 × 152,064.20
  4. Step 4: Simplify right side
    279,387.68x = 58,629,115,672.28
  5. Step 5: Solve for x
    x = 58,629,115,672.28/279,387.68
  6. Step 6: Final answer
    x = 209,848.61

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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.