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Finding the Fourth Proportional to 388,940.54, 583,275.87 and 136,215.45

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Solution

The fourth proportional to 388,940.54, 583,275.87 and 136,215.45 is: 204,275.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,940.54 : 583,275.87 = 136,215.45 : x
  2. Step 2: Convert to fraction form
    388,940.54/583,275.87 = 136,215.45/x
  3. Step 3: Cross multiply
    388,940.54x = 583,275.87 × 136,215.45
  4. Step 4: Simplify right side
    388,940.54x = 79,451,185,106.19
  5. Step 5: Solve for x
    x = 79,451,185,106.19/388,940.54
  6. Step 6: Final answer
    x = 204,275.92

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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.