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Finding the Fourth Proportional to 707.63, 1,061.43 and 275.09

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Solution

The fourth proportional to 707.63, 1,061.43 and 275.09 is: 412.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.63 : 1,061.43 = 275.09 : x
  2. Step 2: Convert to fraction form
    707.63/1,061.43 = 275.09/x
  3. Step 3: Cross multiply
    707.63x = 1,061.43 × 275.09
  4. Step 4: Simplify right side
    707.63x = 291,983.47
  5. Step 5: Solve for x
    x = 291,983.47/707.63
  6. Step 6: Final answer
    x = 412.62

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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.