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Finding the Fourth Proportional to 388,887.68, 583,392.72 and 136,245.44

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Solution

The fourth proportional to 388,887.68, 583,392.72 and 136,245.44 is: 204,389.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,887.68 : 583,392.72 = 136,245.44 : x
  2. Step 2: Convert to fraction form
    388,887.68/583,392.72 = 136,245.44/x
  3. Step 3: Cross multiply
    388,887.68x = 583,392.72 × 136,245.44
  4. Step 4: Simplify right side
    388,887.68x = 79,484,597,829.20
  5. Step 5: Solve for x
    x = 79,484,597,829.20/388,887.68
  6. Step 6: Final answer
    x = 204,389.60

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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.