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Finding the Fourth Proportional to 1,174.71, 1,621.08 and 670.55

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Solution

The fourth proportional to 1,174.71, 1,621.08 and 670.55 is: 925.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.71 : 1,621.08 = 670.55 : x
  2. Step 2: Convert to fraction form
    1,174.71/1,621.08 = 670.55/x
  3. Step 3: Cross multiply
    1,174.71x = 1,621.08 × 670.55
  4. Step 4: Simplify right side
    1,174.71x = 1,087,016.21
  5. Step 5: Solve for x
    x = 1,087,016.21/1,174.71
  6. Step 6: Final answer
    x = 925.35

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1.5x scale

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.