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Finding the Fourth Proportional to 1,193.02, 1,646.40 and 661.93

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Solution

The fourth proportional to 1,193.02, 1,646.40 and 661.93 is: 913.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.02 : 1,646.40 = 661.93 : x
  2. Step 2: Convert to fraction form
    1,193.02/1,646.40 = 661.93/x
  3. Step 3: Cross multiply
    1,193.02x = 1,646.40 × 661.93
  4. Step 4: Simplify right side
    1,193.02x = 1,089,801.55
  5. Step 5: Solve for x
    x = 1,089,801.55/1,193.02
  6. Step 6: Final answer
    x = 913.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.