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Finding the Fourth Proportional to 704.51, 972.29 and 409.87

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Solution

The fourth proportional to 704.51, 972.29 and 409.87 is: 565.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.51 : 972.29 = 409.87 : x
  2. Step 2: Convert to fraction form
    704.51/972.29 = 409.87/x
  3. Step 3: Cross multiply
    704.51x = 972.29 × 409.87
  4. Step 4: Simplify right side
    704.51x = 398,510.45
  5. Step 5: Solve for x
    x = 398,510.45/704.51
  6. Step 6: Final answer
    x = 565.66

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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.