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Finding the Fourth Proportional to 259,561.76, 389,155.72 and 159,515.28

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Solution

The fourth proportional to 259,561.76, 389,155.72 and 159,515.28 is: 239,158.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,561.76 : 389,155.72 = 159,515.28 : x
  2. Step 2: Convert to fraction form
    259,561.76/389,155.72 = 159,515.28/x
  3. Step 3: Cross multiply
    259,561.76x = 389,155.72 × 159,515.28
  4. Step 4: Simplify right side
    259,561.76x = 62,076,283,639.40
  5. Step 5: Solve for x
    x = 62,076,283,639.40/259,561.76
  6. Step 6: Final answer
    x = 239,158.05

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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.