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Finding the Fourth Proportional to 706.68, 1,053.18 and 683.28

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Solution

The fourth proportional to 706.68, 1,053.18 and 683.28 is: 1,018.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.68 : 1,053.18 = 683.28 : x
  2. Step 2: Convert to fraction form
    706.68/1,053.18 = 683.28/x
  3. Step 3: Cross multiply
    706.68x = 1,053.18 × 683.28
  4. Step 4: Simplify right side
    706.68x = 719,616.83
  5. Step 5: Solve for x
    x = 719,616.83/706.68
  6. Step 6: Final answer
    x = 1,018.31

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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.