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Finding the Fourth Proportional to 1,217.79, 1,827.58 and 906.15

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Solution

The fourth proportional to 1,217.79, 1,827.58 and 906.15 is: 1,359.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.79 : 1,827.58 = 906.15 : x
  2. Step 2: Convert to fraction form
    1,217.79/1,827.58 = 906.15/x
  3. Step 3: Cross multiply
    1,217.79x = 1,827.58 × 906.15
  4. Step 4: Simplify right side
    1,217.79x = 1,656,052.48
  5. Step 5: Solve for x
    x = 1,656,052.48/1,217.79
  6. Step 6: Final answer
    x = 1,359.89

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1.5x scale

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.