Home / 280,517.88-387,116.10-153,193.47

Finding the Fourth Proportional to 280,517.88, 387,116.10 and 153,193.47

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Solution

The fourth proportional to 280,517.88, 387,116.10 and 153,193.47 is: 211,407.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,517.88 : 387,116.10 = 153,193.47 : x
  2. Step 2: Convert to fraction form
    280,517.88/387,116.10 = 153,193.47/x
  3. Step 3: Cross multiply
    280,517.88x = 387,116.10 × 153,193.47
  4. Step 4: Simplify right side
    280,517.88x = 59,303,657,885.90
  5. Step 5: Solve for x
    x = 59,303,657,885.90/280,517.88
  6. Step 6: Final answer
    x = 211,407.76

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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.