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Finding the Fourth Proportional to 846.76, 1,269.75 and 456.64

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Solution

The fourth proportional to 846.76, 1,269.75 and 456.64 is: 684.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.76 : 1,269.75 = 456.64 : x
  2. Step 2: Convert to fraction form
    846.76/1,269.75 = 456.64/x
  3. Step 3: Cross multiply
    846.76x = 1,269.75 × 456.64
  4. Step 4: Simplify right side
    846.76x = 579,818.64
  5. Step 5: Solve for x
    x = 579,818.64/846.76
  6. Step 6: Final answer
    x = 684.75

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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.