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Finding the Fourth Proportional to 388,862.97, 536,647.44 and 216,780.90

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Solution

The fourth proportional to 388,862.97, 536,647.44 and 216,780.90 is: 299,166.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,862.97 : 536,647.44 = 216,780.90 : x
  2. Step 2: Convert to fraction form
    388,862.97/536,647.44 = 216,780.90/x
  3. Step 3: Cross multiply
    388,862.97x = 536,647.44 × 216,780.90
  4. Step 4: Simplify right side
    388,862.97x = 116,334,915,025.90
  5. Step 5: Solve for x
    x = 116,334,915,025.90/388,862.97
  6. Step 6: Final answer
    x = 299,166.86

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1.5x scale

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.