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Finding the Fourth Proportional to 388,766.43, 536,503.04 and 216,679.59

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Solution

The fourth proportional to 388,766.43, 536,503.04 and 216,679.59 is: 299,020.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,766.43 : 536,503.04 = 216,679.59 : x
  2. Step 2: Convert to fraction form
    388,766.43/536,503.04 = 216,679.59/x
  3. Step 3: Cross multiply
    388,766.43x = 536,503.04 × 216,679.59
  4. Step 4: Simplify right side
    388,766.43x = 116,249,258,740.95
  5. Step 5: Solve for x
    x = 116,249,258,740.95/388,766.43
  6. Step 6: Final answer
    x = 299,020.83

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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.