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Finding the Fourth Proportional to 278,808.40, 384,754.52 and 151,482.88

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Solution

The fourth proportional to 278,808.40, 384,754.52 and 151,482.88 is: 209,045.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,808.40 : 384,754.52 = 151,482.88 : x
  2. Step 2: Convert to fraction form
    278,808.40/384,754.52 = 151,482.88/x
  3. Step 3: Cross multiply
    278,808.40x = 384,754.52 × 151,482.88
  4. Step 4: Simplify right side
    278,808.40x = 58,283,722,782.62
  5. Step 5: Solve for x
    x = 58,283,722,782.62/278,808.40
  6. Step 6: Final answer
    x = 209,045.79

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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.