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Finding the Fourth Proportional to 1,178.61, 1,767.98 and 906.31

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Solution

The fourth proportional to 1,178.61, 1,767.98 and 906.31 is: 1,359.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.61 : 1,767.98 = 906.31 : x
  2. Step 2: Convert to fraction form
    1,178.61/1,767.98 = 906.31/x
  3. Step 3: Cross multiply
    1,178.61x = 1,767.98 × 906.31
  4. Step 4: Simplify right side
    1,178.61x = 1,602,337.95
  5. Step 5: Solve for x
    x = 1,602,337.95/1,178.61
  6. Step 6: Final answer
    x = 1,359.51

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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.