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Finding the Fourth Proportional to 259,622.70, 389,486.70 and 147,356.70

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Solution

The fourth proportional to 259,622.70, 389,486.70 and 147,356.70 is: 221,064.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,622.70 : 389,486.70 = 147,356.70 : x
  2. Step 2: Convert to fraction form
    259,622.70/389,486.70 = 147,356.70/x
  3. Step 3: Cross multiply
    259,622.70x = 389,486.70 × 147,356.70
  4. Step 4: Simplify right side
    259,622.70x = 57,393,474,805.89
  5. Step 5: Solve for x
    x = 57,393,474,805.89/259,622.70
  6. Step 6: Final answer
    x = 221,064.93

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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.