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Finding the Fourth Proportional to 388,763.43, 536,498.90 and 216,676.59

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Solution

The fourth proportional to 388,763.43, 536,498.90 and 216,676.59 is: 299,016.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,763.43 : 536,498.90 = 216,676.59 : x
  2. Step 2: Convert to fraction form
    388,763.43/536,498.90 = 216,676.59/x
  3. Step 3: Cross multiply
    388,763.43x = 536,498.90 × 216,676.59
  4. Step 4: Simplify right side
    388,763.43x = 116,246,752,190.75
  5. Step 5: Solve for x
    x = 116,246,752,190.75/388,763.43
  6. Step 6: Final answer
    x = 299,016.69

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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.