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Finding the Fourth Proportional to 1,164.80, 1,606.16 and 1,138.08

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Solution

The fourth proportional to 1,164.80, 1,606.16 and 1,138.08 is: 1,569.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,164.80 : 1,606.16 = 1,138.08 : x
  2. Step 2: Convert to fraction form
    1,164.80/1,606.16 = 1,138.08/x
  3. Step 3: Cross multiply
    1,164.80x = 1,606.16 × 1,138.08
  4. Step 4: Simplify right side
    1,164.80x = 1,827,938.57
  5. Step 5: Solve for x
    x = 1,827,938.57/1,164.80
  6. Step 6: Final answer
    x = 1,569.32

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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.