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Finding the Fourth Proportional to 889.79, 1,333.08 and 499.32

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Solution

The fourth proportional to 889.79, 1,333.08 and 499.32 is: 748.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.79 : 1,333.08 = 499.32 : x
  2. Step 2: Convert to fraction form
    889.79/1,333.08 = 499.32/x
  3. Step 3: Cross multiply
    889.79x = 1,333.08 × 499.32
  4. Step 4: Simplify right side
    889.79x = 665,633.51
  5. Step 5: Solve for x
    x = 665,633.51/889.79
  6. Step 6: Final answer
    x = 748.08

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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.