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Finding the Fourth Proportional to 278,806.40, 384,751.76 and 151,480.88

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Solution

The fourth proportional to 278,806.40, 384,751.76 and 151,480.88 is: 209,043.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,806.40 : 384,751.76 = 151,480.88 : x
  2. Step 2: Convert to fraction form
    278,806.40/384,751.76 = 151,480.88/x
  3. Step 3: Cross multiply
    278,806.40x = 384,751.76 × 151,480.88
  4. Step 4: Simplify right side
    278,806.40x = 58,282,535,186.35
  5. Step 5: Solve for x
    x = 58,282,535,186.35/278,806.40
  6. Step 6: Final answer
    x = 209,043.03

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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.