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Finding the Fourth Proportional to 397,718.51, 548,851.63 and 218,870.51

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Solution

The fourth proportional to 397,718.51, 548,851.63 and 218,870.51 is: 302,041.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,718.51 : 548,851.63 = 218,870.51 : x
  2. Step 2: Convert to fraction form
    397,718.51/548,851.63 = 218,870.51/x
  3. Step 3: Cross multiply
    397,718.51x = 548,851.63 × 218,870.51
  4. Step 4: Simplify right side
    397,718.51x = 120,127,436,172.43
  5. Step 5: Solve for x
    x = 120,127,436,172.43/397,718.51
  6. Step 6: Final answer
    x = 302,041.35

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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.