Home / 279,290.28-385,355-158,403.72

Finding the Fourth Proportional to 279,290.28, 385,355 and 158,403.72

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Solution

The fourth proportional to 279,290.28, 385,355 and 158,403.72 is: 218,559.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,290.28 : 385,355 = 158,403.72 : x
  2. Step 2: Convert to fraction form
    279,290.28/385,355 = 158,403.72/x
  3. Step 3: Cross multiply
    279,290.28x = 385,355 × 158,403.72
  4. Step 4: Simplify right side
    279,290.28x = 61,041,665,520.60
  5. Step 5: Solve for x
    x = 61,041,665,520.60/279,290.28
  6. Step 6: Final answer
    x = 218,559.94

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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.