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Finding the Fourth Proportional to 387,964.88, 535,413.48 and 258,680.24

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Solution

The fourth proportional to 387,964.88, 535,413.48 and 258,680.24 is: 356,993.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,964.88 : 535,413.48 = 258,680.24 : x
  2. Step 2: Convert to fraction form
    387,964.88/535,413.48 = 258,680.24/x
  3. Step 3: Cross multiply
    387,964.88x = 535,413.48 × 258,680.24
  4. Step 4: Simplify right side
    387,964.88x = 138,500,887,505.64
  5. Step 5: Solve for x
    x = 138,500,887,505.64/387,964.88
  6. Step 6: Final answer
    x = 356,993.36

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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.