Home / 279,342.09-385,465.40-156,806.42

Finding the Fourth Proportional to 279,342.09, 385,465.40 and 156,806.42

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Solution

The fourth proportional to 279,342.09, 385,465.40 and 156,806.42 is: 216,377.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,342.09 : 385,465.40 = 156,806.42 : x
  2. Step 2: Convert to fraction form
    279,342.09/385,465.40 = 156,806.42/x
  3. Step 3: Cross multiply
    279,342.09x = 385,465.40 × 156,806.42
  4. Step 4: Simplify right side
    279,342.09x = 60,443,447,480.54
  5. Step 5: Solve for x
    x = 60,443,447,480.54/279,342.09
  6. Step 6: Final answer
    x = 216,377.87

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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.