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Finding the Fourth Proportional to 279,077.40, 385,122.42 and 151,751.88

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Solution

The fourth proportional to 279,077.40, 385,122.42 and 151,751.88 is: 209,415.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,077.40 : 385,122.42 = 151,751.88 : x
  2. Step 2: Convert to fraction form
    279,077.40/385,122.42 = 151,751.88/x
  3. Step 3: Cross multiply
    279,077.40x = 385,122.42 × 151,751.88
  4. Step 4: Simplify right side
    279,077.40x = 58,443,051,265.15
  5. Step 5: Solve for x
    x = 58,443,051,265.15/279,077.40
  6. Step 6: Final answer
    x = 209,415.21

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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.