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Finding the Fourth Proportional to 388,725.90, 583,170.66 and 220,326.90

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Solution

The fourth proportional to 388,725.90, 583,170.66 and 220,326.90 is: 330,536.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,725.90 : 583,170.66 = 220,326.90 : x
  2. Step 2: Convert to fraction form
    388,725.90/583,170.66 = 220,326.90/x
  3. Step 3: Cross multiply
    388,725.90x = 583,170.66 × 220,326.90
  4. Step 4: Simplify right side
    388,725.90x = 128,488,183,688.75
  5. Step 5: Solve for x
    x = 128,488,183,688.75/388,725.90
  6. Step 6: Final answer
    x = 330,536.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.