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Finding the Fourth Proportional to 885.51, 1,327.98 and 613.35

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Solution

The fourth proportional to 885.51, 1,327.98 and 613.35 is: 919.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.51 : 1,327.98 = 613.35 : x
  2. Step 2: Convert to fraction form
    885.51/1,327.98 = 613.35/x
  3. Step 3: Cross multiply
    885.51x = 1,327.98 × 613.35
  4. Step 4: Simplify right side
    885.51x = 814,516.53
  5. Step 5: Solve for x
    x = 814,516.53/885.51
  6. Step 6: Final answer
    x = 919.83

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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.