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Finding the Fourth Proportional to 388,669.97, 536,407.98 and 216,603.65

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Solution

The fourth proportional to 388,669.97, 536,407.98 and 216,603.65 is: 298,937.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,669.97 : 536,407.98 = 216,603.65 : x
  2. Step 2: Convert to fraction form
    388,669.97/536,407.98 = 216,603.65/x
  3. Step 3: Cross multiply
    388,669.97x = 536,407.98 × 216,603.65
  4. Step 4: Simplify right side
    388,669.97x = 116,187,923,675.09
  5. Step 5: Solve for x
    x = 116,187,923,675.09/388,669.97
  6. Step 6: Final answer
    x = 298,937.23

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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.