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Finding the Fourth Proportional to 710.29, 1,069.71 and 629.05

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Solution

The fourth proportional to 710.29, 1,069.71 and 629.05 is: 947.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.29 : 1,069.71 = 629.05 : x
  2. Step 2: Convert to fraction form
    710.29/1,069.71 = 629.05/x
  3. Step 3: Cross multiply
    710.29x = 1,069.71 × 629.05
  4. Step 4: Simplify right side
    710.29x = 672,901.59
  5. Step 5: Solve for x
    x = 672,901.59/710.29
  6. Step 6: Final answer
    x = 947.36

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.