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Finding the Fourth Proportional to 899.90, 1,349.18 and 283.25

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Solution

The fourth proportional to 899.90, 1,349.18 and 283.25 is: 424.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.90 : 1,349.18 = 283.25 : x
  2. Step 2: Convert to fraction form
    899.90/1,349.18 = 283.25/x
  3. Step 3: Cross multiply
    899.90x = 1,349.18 × 283.25
  4. Step 4: Simplify right side
    899.90x = 382,153.19
  5. Step 5: Solve for x
    x = 382,153.19/899.90
  6. Step 6: Final answer
    x = 424.66

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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.