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Finding the Fourth Proportional to 401,520.57, 553,888.47 and 238,081.95

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Solution

The fourth proportional to 401,520.57, 553,888.47 and 238,081.95 is: 328,428.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,520.57 : 553,888.47 = 238,081.95 : x
  2. Step 2: Convert to fraction form
    401,520.57/553,888.47 = 238,081.95/x
  3. Step 3: Cross multiply
    401,520.57x = 553,888.47 × 238,081.95
  4. Step 4: Simplify right side
    401,520.57x = 131,870,847,020.12
  5. Step 5: Solve for x
    x = 131,870,847,020.12/401,520.57
  6. Step 6: Final answer
    x = 328,428.62

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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.