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Finding the Fourth Proportional to 278,760.59, 384,658.77 and 154,578.45

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Solution

The fourth proportional to 278,760.59, 384,658.77 and 154,578.45 is: 213,301.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,760.59 : 384,658.77 = 154,578.45 : x
  2. Step 2: Convert to fraction form
    278,760.59/384,658.77 = 154,578.45/x
  3. Step 3: Cross multiply
    278,760.59x = 384,658.77 × 154,578.45
  4. Step 4: Simplify right side
    278,760.59x = 59,459,953,749.32
  5. Step 5: Solve for x
    x = 59,459,953,749.32/278,760.59
  6. Step 6: Final answer
    x = 213,301.14

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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.