Home / 278,787.68-384,642.24-157,909.76

Finding the Fourth Proportional to 278,787.68, 384,642.24 and 157,909.76

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Solution

The fourth proportional to 278,787.68, 384,642.24 and 157,909.76 is: 217,867.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,787.68 : 384,642.24 = 157,909.76 : x
  2. Step 2: Convert to fraction form
    278,787.68/384,642.24 = 157,909.76/x
  3. Step 3: Cross multiply
    278,787.68x = 384,642.24 × 157,909.76
  4. Step 4: Simplify right side
    278,787.68x = 60,738,763,804.26
  5. Step 5: Solve for x
    x = 60,738,763,804.26/278,787.68
  6. Step 6: Final answer
    x = 217,867.46

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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.