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Finding the Fourth Proportional to 388,877.30, 583,315.96 and 122,658.57

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Solution

The fourth proportional to 388,877.30, 583,315.96 and 122,658.57 is: 183,987.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,877.30 : 583,315.96 = 122,658.57 : x
  2. Step 2: Convert to fraction form
    388,877.30/583,315.96 = 122,658.57/x
  3. Step 3: Cross multiply
    388,877.30x = 583,315.96 × 122,658.57
  4. Step 4: Simplify right side
    388,877.30x = 71,548,701,511.78
  5. Step 5: Solve for x
    x = 71,548,701,511.78/388,877.30
  6. Step 6: Final answer
    x = 183,987.86

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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.