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Finding the Fourth Proportional to 388,489.88, 536,044.88 and 216,403.56

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Solution

The fourth proportional to 388,489.88, 536,044.88 and 216,403.56 is: 298,597.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,489.88 : 536,044.88 = 216,403.56 : x
  2. Step 2: Convert to fraction form
    388,489.88/536,044.88 = 216,403.56/x
  3. Step 3: Cross multiply
    388,489.88x = 536,044.88 × 216,403.56
  4. Step 4: Simplify right side
    388,489.88x = 116,002,020,892.78
  5. Step 5: Solve for x
    x = 116,002,020,892.78/388,489.88
  6. Step 6: Final answer
    x = 298,597.28

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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.