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Finding the Fourth Proportional to 388,633.44, 583,042.40 and 122,393.28

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Solution

The fourth proportional to 388,633.44, 583,042.40 and 122,393.28 is: 183,618.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,633.44 : 583,042.40 = 122,393.28 : x
  2. Step 2: Convert to fraction form
    388,633.44/583,042.40 = 122,393.28/x
  3. Step 3: Cross multiply
    388,633.44x = 583,042.40 × 122,393.28
  4. Step 4: Simplify right side
    388,633.44x = 71,360,471,715.07
  5. Step 5: Solve for x
    x = 71,360,471,715.07/388,633.44
  6. Step 6: Final answer
    x = 183,618.97

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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.