Home / 278,985.84-384,992.34-158,138.24

Finding the Fourth Proportional to 278,985.84, 384,992.34 and 158,138.24

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Solution

The fourth proportional to 278,985.84, 384,992.34 and 158,138.24 is: 218,226.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,985.84 : 384,992.34 = 158,138.24 : x
  2. Step 2: Convert to fraction form
    278,985.84/384,992.34 = 158,138.24/x
  3. Step 3: Cross multiply
    278,985.84x = 384,992.34 × 158,138.24
  4. Step 4: Simplify right side
    278,985.84x = 60,882,011,061.08
  5. Step 5: Solve for x
    x = 60,882,011,061.08/278,985.84
  6. Step 6: Final answer
    x = 218,226.17

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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.