Home / 279,128.44-385,188.96-158,280.76

Finding the Fourth Proportional to 279,128.44, 385,188.96 and 158,280.76

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Solution

The fourth proportional to 279,128.44, 385,188.96 and 158,280.76 is: 218,422.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,128.44 : 385,188.96 = 158,280.76 : x
  2. Step 2: Convert to fraction form
    279,128.44/385,188.96 = 158,280.76/x
  3. Step 3: Cross multiply
    279,128.44x = 385,188.96 × 158,280.76
  4. Step 4: Simplify right side
    279,128.44x = 60,968,001,332.41
  5. Step 5: Solve for x
    x = 60,968,001,332.41/279,128.44
  6. Step 6: Final answer
    x = 218,422.75

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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.