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Finding the Fourth Proportional to 388,922.60, 583,311.90 and 108,381.80

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Solution

The fourth proportional to 388,922.60, 583,311.90 and 108,381.80 is: 162,552.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,922.60 : 583,311.90 = 108,381.80 : x
  2. Step 2: Convert to fraction form
    388,922.60/583,311.90 = 108,381.80/x
  3. Step 3: Cross multiply
    388,922.60x = 583,311.90 × 108,381.80
  4. Step 4: Simplify right side
    388,922.60x = 63,220,393,683.42
  5. Step 5: Solve for x
    x = 63,220,393,683.42/388,922.60
  6. Step 6: Final answer
    x = 162,552.64

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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.