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Finding the Fourth Proportional to 388,766.61, 536,500.41 and 216,695.48

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Solution

The fourth proportional to 388,766.61, 536,500.41 and 216,695.48 is: 299,041.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,766.61 : 536,500.41 = 216,695.48 : x
  2. Step 2: Convert to fraction form
    388,766.61/536,500.41 = 216,695.48/x
  3. Step 3: Cross multiply
    388,766.61x = 536,500.41 × 216,695.48
  4. Step 4: Simplify right side
    388,766.61x = 116,257,215,206.40
  5. Step 5: Solve for x
    x = 116,257,215,206.40/388,766.61
  6. Step 6: Final answer
    x = 299,041.15

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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.