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Finding the Fourth Proportional to 1,193.07, 1,646.42 and 661.94

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Solution

The fourth proportional to 1,193.07, 1,646.42 and 661.94 is: 913.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.07 : 1,646.42 = 661.94 : x
  2. Step 2: Convert to fraction form
    1,193.07/1,646.42 = 661.94/x
  3. Step 3: Cross multiply
    1,193.07x = 1,646.42 × 661.94
  4. Step 4: Simplify right side
    1,193.07x = 1,089,819.71
  5. Step 5: Solve for x
    x = 1,089,819.71/1,193.07
  6. Step 6: Final answer
    x = 913.46

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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.