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Finding the Fourth Proportional to 710.65, 1,065.78 and 450.26

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Solution

The fourth proportional to 710.65, 1,065.78 and 450.26 is: 675.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.65 : 1,065.78 = 450.26 : x
  2. Step 2: Convert to fraction form
    710.65/1,065.78 = 450.26/x
  3. Step 3: Cross multiply
    710.65x = 1,065.78 × 450.26
  4. Step 4: Simplify right side
    710.65x = 479,878.04
  5. Step 5: Solve for x
    x = 479,878.04/710.65
  6. Step 6: Final answer
    x = 675.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.