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Finding the Fourth Proportional to 657,639.20, 986,458.80 and 236,928.80

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Solution

The fourth proportional to 657,639.20, 986,458.80 and 236,928.80 is: 355,393.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,639.20 : 986,458.80 = 236,928.80 : x
  2. Step 2: Convert to fraction form
    657,639.20/986,458.80 = 236,928.80/x
  3. Step 3: Cross multiply
    657,639.20x = 986,458.80 × 236,928.80
  4. Step 4: Simplify right side
    657,639.20x = 233,720,499,733.44
  5. Step 5: Solve for x
    x = 233,720,499,733.44/657,639.20
  6. Step 6: Final answer
    x = 355,393.20

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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.