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Finding the Fourth Proportional to 707.12, 975.81 and 412.42

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Solution

The fourth proportional to 707.12, 975.81 and 412.42 is: 569.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.12 : 975.81 = 412.42 : x
  2. Step 2: Convert to fraction form
    707.12/975.81 = 412.42/x
  3. Step 3: Cross multiply
    707.12x = 975.81 × 412.42
  4. Step 4: Simplify right side
    707.12x = 402,443.56
  5. Step 5: Solve for x
    x = 402,443.56/707.12
  6. Step 6: Final answer
    x = 569.13

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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.