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Finding the Fourth Proportional to 278,810.88, 384,763.05 and 151,485.57

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Solution

The fourth proportional to 278,810.88, 384,763.05 and 151,485.57 is: 209,052.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,810.88 : 384,763.05 = 151,485.57 : x
  2. Step 2: Convert to fraction form
    278,810.88/384,763.05 = 151,485.57/x
  3. Step 3: Cross multiply
    278,810.88x = 384,763.05 × 151,485.57
  4. Step 4: Simplify right side
    278,810.88x = 58,286,049,944.19
  5. Step 5: Solve for x
    x = 58,286,049,944.19/278,810.88
  6. Step 6: Final answer
    x = 209,052.28

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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.