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Finding the Fourth Proportional to 1,146.66, 1,582.39 and 622.69

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Solution

The fourth proportional to 1,146.66, 1,582.39 and 622.69 is: 859.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.66 : 1,582.39 = 622.69 : x
  2. Step 2: Convert to fraction form
    1,146.66/1,582.39 = 622.69/x
  3. Step 3: Cross multiply
    1,146.66x = 1,582.39 × 622.69
  4. Step 4: Simplify right side
    1,146.66x = 985,332.92
  5. Step 5: Solve for x
    x = 985,332.92/1,146.66
  6. Step 6: Final answer
    x = 859.31

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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.