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Finding the Fourth Proportional to 903.12, 1,246.68 and 669.84

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Solution

The fourth proportional to 903.12, 1,246.68 and 669.84 is: 924.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.12 : 1,246.68 = 669.84 : x
  2. Step 2: Convert to fraction form
    903.12/1,246.68 = 669.84/x
  3. Step 3: Cross multiply
    903.12x = 1,246.68 × 669.84
  4. Step 4: Simplify right side
    903.12x = 835,076.13
  5. Step 5: Solve for x
    x = 835,076.13/903.12
  6. Step 6: Final answer
    x = 924.66

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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.