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Finding the Fourth Proportional to 1,170.07, 1,614.66 and 646.06

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Solution

The fourth proportional to 1,170.07, 1,614.66 and 646.06 is: 891.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.07 : 1,614.66 = 646.06 : x
  2. Step 2: Convert to fraction form
    1,170.07/1,614.66 = 646.06/x
  3. Step 3: Cross multiply
    1,170.07x = 1,614.66 × 646.06
  4. Step 4: Simplify right side
    1,170.07x = 1,043,167.24
  5. Step 5: Solve for x
    x = 1,043,167.24/1,170.07
  6. Step 6: Final answer
    x = 891.54

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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.