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Finding the Fourth Proportional to 388,306.40, 535,937.69 and 235,428.32

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Solution

The fourth proportional to 388,306.40, 535,937.69 and 235,428.32 is: 324,936.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,306.40 : 535,937.69 = 235,428.32 : x
  2. Step 2: Convert to fraction form
    388,306.40/535,937.69 = 235,428.32/x
  3. Step 3: Cross multiply
    388,306.40x = 535,937.69 × 235,428.32
  4. Step 4: Simplify right side
    388,306.40x = 126,174,907,890.26
  5. Step 5: Solve for x
    x = 126,174,907,890.26/388,306.40
  6. Step 6: Final answer
    x = 324,936.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.