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Finding the Fourth Proportional to 274,257.72, 378,510.71 and 153,405.72

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Solution

The fourth proportional to 274,257.72, 378,510.71 and 153,405.72 is: 211,719.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,257.72 : 378,510.71 = 153,405.72 : x
  2. Step 2: Convert to fraction form
    274,257.72/378,510.71 = 153,405.72/x
  3. Step 3: Cross multiply
    274,257.72x = 378,510.71 × 153,405.72
  4. Step 4: Simplify right side
    274,257.72x = 58,065,707,228.23
  5. Step 5: Solve for x
    x = 58,065,707,228.23/274,257.72
  6. Step 6: Final answer
    x = 211,719.50

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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.