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Finding the Fourth Proportional to 889.60, 1,333.54 and 499.79

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Solution

The fourth proportional to 889.60, 1,333.54 and 499.79 is: 749.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.60 : 1,333.54 = 499.79 : x
  2. Step 2: Convert to fraction form
    889.60/1,333.54 = 499.79/x
  3. Step 3: Cross multiply
    889.60x = 1,333.54 × 499.79
  4. Step 4: Simplify right side
    889.60x = 666,489.96
  5. Step 5: Solve for x
    x = 666,489.96/889.60
  6. Step 6: Final answer
    x = 749.20

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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.