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Finding the Fourth Proportional to 972,990.72, 1,342,728 and 543,270.24

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Solution

The fourth proportional to 972,990.72, 1,342,728 and 543,270.24 is: 749,713.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    972,990.72 : 1,342,728 = 543,270.24 : x
  2. Step 2: Convert to fraction form
    972,990.72/1,342,728 = 543,270.24/x
  3. Step 3: Cross multiply
    972,990.72x = 1,342,728 × 543,270.24
  4. Step 4: Simplify right side
    972,990.72x = 729,464,162,814.72
  5. Step 5: Solve for x
    x = 729,464,162,814.72/972,990.72
  6. Step 6: Final answer
    x = 749,713.38

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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.