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Finding the Fourth Proportional to 397,718.76, 548,851.97 and 218,870.76

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Solution

The fourth proportional to 397,718.76, 548,851.97 and 218,870.76 is: 302,041.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,718.76 : 548,851.97 = 218,870.76 : x
  2. Step 2: Convert to fraction form
    397,718.76/548,851.97 = 218,870.76/x
  3. Step 3: Cross multiply
    397,718.76x = 548,851.97 × 218,870.76
  4. Step 4: Simplify right side
    397,718.76x = 120,127,647,801.40
  5. Step 5: Solve for x
    x = 120,127,647,801.40/397,718.76
  6. Step 6: Final answer
    x = 302,041.69

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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.