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Finding the Fourth Proportional to 1,316.80, 1,971.05 and 903.52

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Solution

The fourth proportional to 1,316.80, 1,971.05 and 903.52 is: 1,352.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.80 : 1,971.05 = 903.52 : x
  2. Step 2: Convert to fraction form
    1,316.80/1,971.05 = 903.52/x
  3. Step 3: Cross multiply
    1,316.80x = 1,971.05 × 903.52
  4. Step 4: Simplify right side
    1,316.80x = 1,780,873.24
  5. Step 5: Solve for x
    x = 1,780,873.24/1,316.80
  6. Step 6: Final answer
    x = 1,352.43

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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.