Home / 278,500.24-417,840.17-128,838.56

Finding the Fourth Proportional to 278,500.24, 417,840.17 and 128,838.56

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Solution

The fourth proportional to 278,500.24, 417,840.17 and 128,838.56 is: 193,299.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,500.24 : 417,840.17 = 128,838.56 : x
  2. Step 2: Convert to fraction form
    278,500.24/417,840.17 = 128,838.56/x
  3. Step 3: Cross multiply
    278,500.24x = 417,840.17 × 128,838.56
  4. Step 4: Simplify right side
    278,500.24x = 53,833,925,812.96
  5. Step 5: Solve for x
    x = 53,833,925,812.96/278,500.24
  6. Step 6: Final answer
    x = 193,299.39

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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.