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Finding the Fourth Proportional to 1,164.12, 1,606.41 and 640.13

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Solution

The fourth proportional to 1,164.12, 1,606.41 and 640.13 is: 883.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,164.12 : 1,606.41 = 640.13 : x
  2. Step 2: Convert to fraction form
    1,164.12/1,606.41 = 640.13/x
  3. Step 3: Cross multiply
    1,164.12x = 1,606.41 × 640.13
  4. Step 4: Simplify right side
    1,164.12x = 1,028,303.20
  5. Step 5: Solve for x
    x = 1,028,303.20/1,164.12
  6. Step 6: Final answer
    x = 883.33

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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.