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Finding the Fourth Proportional to 1,098.48, 1,646.64 and 609.60

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Solution

The fourth proportional to 1,098.48, 1,646.64 and 609.60 is: 913.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.48 : 1,646.64 = 609.60 : x
  2. Step 2: Convert to fraction form
    1,098.48/1,646.64 = 609.60/x
  3. Step 3: Cross multiply
    1,098.48x = 1,646.64 × 609.60
  4. Step 4: Simplify right side
    1,098.48x = 1,003,791.74
  5. Step 5: Solve for x
    x = 1,003,791.74/1,098.48
  6. Step 6: Final answer
    x = 913.80

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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.