Home / 280,564.85-387,179.49-153,240.75

Finding the Fourth Proportional to 280,564.85, 387,179.49 and 153,240.75

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Solution

The fourth proportional to 280,564.85, 387,179.49 and 153,240.75 is: 211,472.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,564.85 : 387,179.49 = 153,240.75 : x
  2. Step 2: Convert to fraction form
    280,564.85/387,179.49 = 153,240.75/x
  3. Step 3: Cross multiply
    280,564.85x = 387,179.49 × 153,240.75
  4. Step 4: Simplify right side
    280,564.85x = 59,331,675,432.22
  5. Step 5: Solve for x
    x = 59,331,675,432.22/280,564.85
  6. Step 6: Final answer
    x = 211,472.23

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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.