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Finding the Fourth Proportional to 1,167.49, 1,611.05 and 670.05

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Solution

The fourth proportional to 1,167.49, 1,611.05 and 670.05 is: 924.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.49 : 1,611.05 = 670.05 : x
  2. Step 2: Convert to fraction form
    1,167.49/1,611.05 = 670.05/x
  3. Step 3: Cross multiply
    1,167.49x = 1,611.05 × 670.05
  4. Step 4: Simplify right side
    1,167.49x = 1,079,484.05
  5. Step 5: Solve for x
    x = 1,079,484.05/1,167.49
  6. Step 6: Final answer
    x = 924.62

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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.