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Finding the Fourth Proportional to 1,193.71, 1,647.36 and 669.91

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Solution

The fourth proportional to 1,193.71, 1,647.36 and 669.91 is: 924.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.71 : 1,647.36 = 669.91 : x
  2. Step 2: Convert to fraction form
    1,193.71/1,647.36 = 669.91/x
  3. Step 3: Cross multiply
    1,193.71x = 1,647.36 × 669.91
  4. Step 4: Simplify right side
    1,193.71x = 1,103,582.94
  5. Step 5: Solve for x
    x = 1,103,582.94/1,193.71
  6. Step 6: Final answer
    x = 924.50

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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.