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Finding the Fourth Proportional to 846.65, 1,269.34 and 538.45

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Solution

The fourth proportional to 846.65, 1,269.34 and 538.45 is: 807.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.65 : 1,269.34 = 538.45 : x
  2. Step 2: Convert to fraction form
    846.65/1,269.34 = 538.45/x
  3. Step 3: Cross multiply
    846.65x = 1,269.34 × 538.45
  4. Step 4: Simplify right side
    846.65x = 683,471.60
  5. Step 5: Solve for x
    x = 683,471.60/846.65
  6. Step 6: Final answer
    x = 807.26

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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.