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Finding the Fourth Proportional to 291,721.50, 402,576.03 and 157,585.50

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Solution

The fourth proportional to 291,721.50, 402,576.03 and 157,585.50 is: 217,468.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,721.50 : 402,576.03 = 157,585.50 : x
  2. Step 2: Convert to fraction form
    291,721.50/402,576.03 = 157,585.50/x
  3. Step 3: Cross multiply
    291,721.50x = 402,576.03 × 157,585.50
  4. Step 4: Simplify right side
    291,721.50x = 63,440,144,975.57
  5. Step 5: Solve for x
    x = 63,440,144,975.57/291,721.50
  6. Step 6: Final answer
    x = 217,468.18

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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.