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Finding the Fourth Proportional to 880.25, 1,214.64 and 507.15

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Solution

The fourth proportional to 880.25, 1,214.64 and 507.15 is: 699.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.25 : 1,214.64 = 507.15 : x
  2. Step 2: Convert to fraction form
    880.25/1,214.64 = 507.15/x
  3. Step 3: Cross multiply
    880.25x = 1,214.64 × 507.15
  4. Step 4: Simplify right side
    880.25x = 616,004.68
  5. Step 5: Solve for x
    x = 616,004.68/880.25
  6. Step 6: Final answer
    x = 699.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.