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Finding the Fourth Proportional to 853.44, 1,281.54 and 530.84

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Solution

The fourth proportional to 853.44, 1,281.54 and 530.84 is: 797.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.44 : 1,281.54 = 530.84 : x
  2. Step 2: Convert to fraction form
    853.44/1,281.54 = 530.84/x
  3. Step 3: Cross multiply
    853.44x = 1,281.54 × 530.84
  4. Step 4: Simplify right side
    853.44x = 680,292.69
  5. Step 5: Solve for x
    x = 680,292.69/853.44
  6. Step 6: Final answer
    x = 797.12

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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.