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Finding the Fourth Proportional to 846.90, 1,269.42 and 538.89

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Solution

The fourth proportional to 846.90, 1,269.42 and 538.89 is: 807.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.90 : 1,269.42 = 538.89 : x
  2. Step 2: Convert to fraction form
    846.90/1,269.42 = 538.89/x
  3. Step 3: Cross multiply
    846.90x = 1,269.42 × 538.89
  4. Step 4: Simplify right side
    846.90x = 684,071.40
  5. Step 5: Solve for x
    x = 684,071.40/846.90
  6. Step 6: Final answer
    x = 807.74

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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.