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Finding the Fourth Proportional to 280,604.70, 387,228.20 and 153,280.80

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Solution

The fourth proportional to 280,604.70, 387,228.20 and 153,280.80 is: 211,524.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,604.70 : 387,228.20 = 153,280.80 : x
  2. Step 2: Convert to fraction form
    280,604.70/387,228.20 = 153,280.80/x
  3. Step 3: Cross multiply
    280,604.70x = 387,228.20 × 153,280.80
  4. Step 4: Simplify right side
    280,604.70x = 59,354,647,512.16
  5. Step 5: Solve for x
    x = 59,354,647,512.16/280,604.70
  6. Step 6: Final answer
    x = 211,524.07

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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.