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Finding the Fourth Proportional to 401,920.88, 554,537.16 and 258,763.79

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Solution

The fourth proportional to 401,920.88, 554,537.16 and 258,763.79 is: 357,020.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,920.88 : 554,537.16 = 258,763.79 : x
  2. Step 2: Convert to fraction form
    401,920.88/554,537.16 = 258,763.79/x
  3. Step 3: Cross multiply
    401,920.88x = 554,537.16 × 258,763.79
  4. Step 4: Simplify right side
    401,920.88x = 143,494,138,603.78
  5. Step 5: Solve for x
    x = 143,494,138,603.78/401,920.88
  6. Step 6: Final answer
    x = 357,020.87

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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.