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Finding the Fourth Proportional to 278,478.96, 417,156.58 and 128,510.88

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Solution

The fourth proportional to 278,478.96, 417,156.58 and 128,510.88 is: 192,507.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,478.96 : 417,156.58 = 128,510.88 : x
  2. Step 2: Convert to fraction form
    278,478.96/417,156.58 = 128,510.88/x
  3. Step 3: Cross multiply
    278,478.96x = 417,156.58 × 128,510.88
  4. Step 4: Simplify right side
    278,478.96x = 53,609,159,193.59
  5. Step 5: Solve for x
    x = 53,609,159,193.59/278,478.96
  6. Step 6: Final answer
    x = 192,507.04

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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.