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Finding the Fourth Proportional to 278,813.16, 384,765.66 and 151,490.88

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Solution

The fourth proportional to 278,813.16, 384,765.66 and 151,490.88 is: 209,059.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,813.16 : 384,765.66 = 151,490.88 : x
  2. Step 2: Convert to fraction form
    278,813.16/384,765.66 = 151,490.88/x
  3. Step 3: Cross multiply
    278,813.16x = 384,765.66 × 151,490.88
  4. Step 4: Simplify right side
    278,813.16x = 58,288,488,427.18
  5. Step 5: Solve for x
    x = 58,288,488,427.18/278,813.16
  6. Step 6: Final answer
    x = 209,059.32

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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.