Home / 279,985.21-386,411.92-155,818.74

Finding the Fourth Proportional to 279,985.21, 386,411.92 and 155,818.74

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Solution

The fourth proportional to 279,985.21, 386,411.92 and 155,818.74 is: 215,047.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,985.21 : 386,411.92 = 155,818.74 : x
  2. Step 2: Convert to fraction form
    279,985.21/386,411.92 = 155,818.74/x
  3. Step 3: Cross multiply
    279,985.21x = 386,411.92 × 155,818.74
  4. Step 4: Simplify right side
    279,985.21x = 60,210,217,381.31
  5. Step 5: Solve for x
    x = 60,210,217,381.31/279,985.21
  6. Step 6: Final answer
    x = 215,047.85

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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.