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Finding the Fourth Proportional to 278,139.70, 417,209.55 and 236,805.40

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Solution

The fourth proportional to 278,139.70, 417,209.55 and 236,805.40 is: 355,208.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,139.70 : 417,209.55 = 236,805.40 : x
  2. Step 2: Convert to fraction form
    278,139.70/417,209.55 = 236,805.40/x
  3. Step 3: Cross multiply
    278,139.70x = 417,209.55 × 236,805.40
  4. Step 4: Simplify right side
    278,139.70x = 98,797,474,371.57
  5. Step 5: Solve for x
    x = 98,797,474,371.57/278,139.70
  6. Step 6: Final answer
    x = 355,208.10

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1.5x scale

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.