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Finding the Fourth Proportional to 279,140.58, 385,215.82 and 151,817.10

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Solution

The fourth proportional to 279,140.58, 385,215.82 and 151,817.10 is: 209,508.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,140.58 : 385,215.82 = 151,817.10 : x
  2. Step 2: Convert to fraction form
    279,140.58/385,215.82 = 151,817.10/x
  3. Step 3: Cross multiply
    279,140.58x = 385,215.82 × 151,817.10
  4. Step 4: Simplify right side
    279,140.58x = 58,482,348,666.52
  5. Step 5: Solve for x
    x = 58,482,348,666.52/279,140.58
  6. Step 6: Final answer
    x = 209,508.59

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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.