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Finding the Fourth Proportional to 707.48, 1,055.54 and 629.51

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Solution

The fourth proportional to 707.48, 1,055.54 and 629.51 is: 939.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.48 : 1,055.54 = 629.51 : x
  2. Step 2: Convert to fraction form
    707.48/1,055.54 = 629.51/x
  3. Step 3: Cross multiply
    707.48x = 1,055.54 × 629.51
  4. Step 4: Simplify right side
    707.48x = 664,472.48
  5. Step 5: Solve for x
    x = 664,472.48/707.48
  6. Step 6: Final answer
    x = 939.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.