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Finding the Fourth Proportional to 1,151.55, 1,578.79 and 1,130.79

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Solution

The fourth proportional to 1,151.55, 1,578.79 and 1,130.79 is: 1,550.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.55 : 1,578.79 = 1,130.79 : x
  2. Step 2: Convert to fraction form
    1,151.55/1,578.79 = 1,130.79/x
  3. Step 3: Cross multiply
    1,151.55x = 1,578.79 × 1,130.79
  4. Step 4: Simplify right side
    1,151.55x = 1,785,274.29
  5. Step 5: Solve for x
    x = 1,785,274.29/1,151.55
  6. Step 6: Final answer
    x = 1,550.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.