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Finding the Fourth Proportional to 397,711.13, 548,841.45 and 218,863.13

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Solution

The fourth proportional to 397,711.13, 548,841.45 and 218,863.13 is: 302,031.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,711.13 : 548,841.45 = 218,863.13 : x
  2. Step 2: Convert to fraction form
    397,711.13/548,841.45 = 218,863.13/x
  3. Step 3: Cross multiply
    397,711.13x = 548,841.45 × 218,863.13
  4. Step 4: Simplify right side
    397,711.13x = 120,121,153,782.22
  5. Step 5: Solve for x
    x = 120,121,153,782.22/397,711.13
  6. Step 6: Final answer
    x = 302,031.16

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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.