Home / 278,315.85-384,112.04-155,854.85

Finding the Fourth Proportional to 278,315.85, 384,112.04 and 155,854.85

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Solution

The fourth proportional to 278,315.85, 384,112.04 and 155,854.85 is: 215,099.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,315.85 : 384,112.04 = 155,854.85 : x
  2. Step 2: Convert to fraction form
    278,315.85/384,112.04 = 155,854.85/x
  3. Step 3: Cross multiply
    278,315.85x = 384,112.04 × 155,854.85
  4. Step 4: Simplify right side
    278,315.85x = 59,865,724,714.87
  5. Step 5: Solve for x
    x = 59,865,724,714.87/278,315.85
  6. Step 6: Final answer
    x = 215,099.95

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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.