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Finding the Fourth Proportional to 278,710.80, 384,625.08 and 151,388.88

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Solution

The fourth proportional to 278,710.80, 384,625.08 and 151,388.88 is: 208,918.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,710.80 : 384,625.08 = 151,388.88 : x
  2. Step 2: Convert to fraction form
    278,710.80/384,625.08 = 151,388.88/x
  3. Step 3: Cross multiply
    278,710.80x = 384,625.08 × 151,388.88
  4. Step 4: Simplify right side
    278,710.80x = 58,227,960,081.11
  5. Step 5: Solve for x
    x = 58,227,960,081.11/278,710.80
  6. Step 6: Final answer
    x = 208,918.92

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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.