Home / 278,443.35-417,598.04-128,539.70

Finding the Fourth Proportional to 278,443.35, 417,598.04 and 128,539.70

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Solution

The fourth proportional to 278,443.35, 417,598.04 and 128,539.70 is: 192,778.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,443.35 : 417,598.04 = 128,539.70 : x
  2. Step 2: Convert to fraction form
    278,443.35/417,598.04 = 128,539.70/x
  3. Step 3: Cross multiply
    278,443.35x = 417,598.04 × 128,539.70
  4. Step 4: Simplify right side
    278,443.35x = 53,677,926,782.19
  5. Step 5: Solve for x
    x = 53,677,926,782.19/278,443.35
  6. Step 6: Final answer
    x = 192,778.63

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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.