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Finding the Fourth Proportional to 388,963.72, 536,413.19 and 266,633.88

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Solution

The fourth proportional to 388,963.72, 536,413.19 and 266,633.88 is: 367,710.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,963.72 : 536,413.19 = 266,633.88 : x
  2. Step 2: Convert to fraction form
    388,963.72/536,413.19 = 266,633.88/x
  3. Step 3: Cross multiply
    388,963.72x = 536,413.19 × 266,633.88
  4. Step 4: Simplify right side
    388,963.72x = 143,025,926,788.16
  5. Step 5: Solve for x
    x = 143,025,926,788.16/388,963.72
  6. Step 6: Final answer
    x = 367,710.20

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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.