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Finding the Fourth Proportional to 278,898.62, 384,879.92 and 151,574.24

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Solution

The fourth proportional to 278,898.62, 384,879.92 and 151,574.24 is: 209,172.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,898.62 : 384,879.92 = 151,574.24 : x
  2. Step 2: Convert to fraction form
    278,898.62/384,879.92 = 151,574.24/x
  3. Step 3: Cross multiply
    278,898.62x = 384,879.92 × 151,574.24
  4. Step 4: Simplify right side
    278,898.62x = 58,337,881,365.26
  5. Step 5: Solve for x
    x = 58,337,881,365.26/278,898.62
  6. Step 6: Final answer
    x = 209,172.36

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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.