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Finding the Fourth Proportional to 868.65, 1,300.56 and 608.06

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Solution

The fourth proportional to 868.65, 1,300.56 and 608.06 is: 910.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.65 : 1,300.56 = 608.06 : x
  2. Step 2: Convert to fraction form
    868.65/1,300.56 = 608.06/x
  3. Step 3: Cross multiply
    868.65x = 1,300.56 × 608.06
  4. Step 4: Simplify right side
    868.65x = 790,812.01
  5. Step 5: Solve for x
    x = 790,812.01/868.65
  6. Step 6: Final answer
    x = 910.39

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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.