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Finding the Fourth Proportional to 279,141.58, 385,217.20 and 151,818.10

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Solution

The fourth proportional to 279,141.58, 385,217.20 and 151,818.10 is: 209,509.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,141.58 : 385,217.20 = 151,818.10 : x
  2. Step 2: Convert to fraction form
    279,141.58/385,217.20 = 151,818.10/x
  3. Step 3: Cross multiply
    279,141.58x = 385,217.20 × 151,818.10
  4. Step 4: Simplify right side
    279,141.58x = 58,482,943,391.32
  5. Step 5: Solve for x
    x = 58,482,943,391.32/279,141.58
  6. Step 6: Final answer
    x = 209,509.97

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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.