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Finding the Fourth Proportional to 899.78, 1,349.67 and 283.53

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Solution

The fourth proportional to 899.78, 1,349.67 and 283.53 is: 425.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.78 : 1,349.67 = 283.53 : x
  2. Step 2: Convert to fraction form
    899.78/1,349.67 = 283.53/x
  3. Step 3: Cross multiply
    899.78x = 1,349.67 × 283.53
  4. Step 4: Simplify right side
    899.78x = 382,670.52
  5. Step 5: Solve for x
    x = 382,670.52/899.78
  6. Step 6: Final answer
    x = 425.30

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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.