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Finding the Fourth Proportional to 707.31, 975.75 and 458.71

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Solution

The fourth proportional to 707.31, 975.75 and 458.71 is: 632.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.31 : 975.75 = 458.71 : x
  2. Step 2: Convert to fraction form
    707.31/975.75 = 458.71/x
  3. Step 3: Cross multiply
    707.31x = 975.75 × 458.71
  4. Step 4: Simplify right side
    707.31x = 447,586.28
  5. Step 5: Solve for x
    x = 447,586.28/707.31
  6. Step 6: Final answer
    x = 632.80

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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.