Home / 278,995.38-385,015.86-151,670.68

Finding the Fourth Proportional to 278,995.38, 385,015.86 and 151,670.68

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Solution

The fourth proportional to 278,995.38, 385,015.86 and 151,670.68 is: 209,306.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,995.38 : 385,015.86 = 151,670.68 : x
  2. Step 2: Convert to fraction form
    278,995.38/385,015.86 = 151,670.68/x
  3. Step 3: Cross multiply
    278,995.38x = 385,015.86 × 151,670.68
  4. Step 4: Simplify right side
    278,995.38x = 58,395,617,296.98
  5. Step 5: Solve for x
    x = 58,395,617,296.98/278,995.38
  6. Step 6: Final answer
    x = 209,306.75

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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.