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Finding the Fourth Proportional to 388,962.75, 583,542.59 and 108,480

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Solution

The fourth proportional to 388,962.75, 583,542.59 and 108,480 is: 162,747.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,962.75 : 583,542.59 = 108,480 : x
  2. Step 2: Convert to fraction form
    388,962.75/583,542.59 = 108,480/x
  3. Step 3: Cross multiply
    388,962.75x = 583,542.59 × 108,480
  4. Step 4: Simplify right side
    388,962.75x = 63,302,699,620.80
  5. Step 5: Solve for x
    x = 63,302,699,620.80/388,962.75
  6. Step 6: Final answer
    x = 162,747.46

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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.