Home / 280,716.02-387,389.09-153,391.61

Finding the Fourth Proportional to 280,716.02, 387,389.09 and 153,391.61

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Solution

The fourth proportional to 280,716.02, 387,389.09 and 153,391.61 is: 211,680.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,716.02 : 387,389.09 = 153,391.61 : x
  2. Step 2: Convert to fraction form
    280,716.02/387,389.09 = 153,391.61/x
  3. Step 3: Cross multiply
    280,716.02x = 387,389.09 × 153,391.61
  4. Step 4: Simplify right side
    280,716.02x = 59,422,236,211.53
  5. Step 5: Solve for x
    x = 59,422,236,211.53/280,716.02
  6. Step 6: Final answer
    x = 211,680.96

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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.