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Finding the Fourth Proportional to 786.05, 1,084.33 and 533.89

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Solution

The fourth proportional to 786.05, 1,084.33 and 533.89 is: 736.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    786.05 : 1,084.33 = 533.89 : x
  2. Step 2: Convert to fraction form
    786.05/1,084.33 = 533.89/x
  3. Step 3: Cross multiply
    786.05x = 1,084.33 × 533.89
  4. Step 4: Simplify right side
    786.05x = 578,908.90
  5. Step 5: Solve for x
    x = 578,908.90/786.05
  6. Step 6: Final answer
    x = 736.48

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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.