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Finding the Fourth Proportional to 391,600.97, 540,399.57 and 217,170.16

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Solution

The fourth proportional to 391,600.97, 540,399.57 and 217,170.16 is: 299,689.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,600.97 : 540,399.57 = 217,170.16 : x
  2. Step 2: Convert to fraction form
    391,600.97/540,399.57 = 217,170.16/x
  3. Step 3: Cross multiply
    391,600.97x = 540,399.57 × 217,170.16
  4. Step 4: Simplify right side
    391,600.97x = 117,358,661,080.83
  5. Step 5: Solve for x
    x = 117,358,661,080.83/391,600.97
  6. Step 6: Final answer
    x = 299,689.40

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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.