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Finding the Fourth Proportional to 279,319.06, 385,460.40 and 151,991.92

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Solution

The fourth proportional to 279,319.06, 385,460.40 and 151,991.92 is: 209,748.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,319.06 : 385,460.40 = 151,991.92 : x
  2. Step 2: Convert to fraction form
    279,319.06/385,460.40 = 151,991.92/x
  3. Step 3: Cross multiply
    279,319.06x = 385,460.40 × 151,991.92
  4. Step 4: Simplify right side
    279,319.06x = 58,586,866,279.97
  5. Step 5: Solve for x
    x = 58,586,866,279.97/279,319.06
  6. Step 6: Final answer
    x = 209,748.90

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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.