Home / 280,520.20-387,111.72-153,196.30

Finding the Fourth Proportional to 280,520.20, 387,111.72 and 153,196.30

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Solution

The fourth proportional to 280,520.20, 387,111.72 and 153,196.30 is: 211,407.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,520.20 : 387,111.72 = 153,196.30 : x
  2. Step 2: Convert to fraction form
    280,520.20/387,111.72 = 153,196.30/x
  3. Step 3: Cross multiply
    280,520.20x = 387,111.72 × 153,196.30
  4. Step 4: Simplify right side
    280,520.20x = 59,304,083,190.64
  5. Step 5: Solve for x
    x = 59,304,083,190.64/280,520.20
  6. Step 6: Final answer
    x = 211,407.53

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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.