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Finding the Fourth Proportional to 388,789.92, 536,535.48 and 216,703.12

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Solution

The fourth proportional to 388,789.92, 536,535.48 and 216,703.12 is: 299,053.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,789.92 : 536,535.48 = 216,703.12 : x
  2. Step 2: Convert to fraction form
    388,789.92/536,535.48 = 216,703.12/x
  3. Step 3: Cross multiply
    388,789.92x = 536,535.48 × 216,703.12
  4. Step 4: Simplify right side
    388,789.92x = 116,268,912,506.70
  5. Step 5: Solve for x
    x = 116,268,912,506.70/388,789.92
  6. Step 6: Final answer
    x = 299,053.31

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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.