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Finding the Fourth Proportional to 278,139.60, 417,209.40 and 248,615.10

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Solution

The fourth proportional to 278,139.60, 417,209.40 and 248,615.10 is: 372,922.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,139.60 : 417,209.40 = 248,615.10 : x
  2. Step 2: Convert to fraction form
    278,139.60/417,209.40 = 248,615.10/x
  3. Step 3: Cross multiply
    278,139.60x = 417,209.40 × 248,615.10
  4. Step 4: Simplify right side
    278,139.60x = 103,724,556,701.94
  5. Step 5: Solve for x
    x = 103,724,556,701.94/278,139.60
  6. Step 6: Final answer
    x = 372,922.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.