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Finding the Fourth Proportional to 859.77, 1,289.73 and 243.48

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Solution

The fourth proportional to 859.77, 1,289.73 and 243.48 is: 365.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.77 : 1,289.73 = 243.48 : x
  2. Step 2: Convert to fraction form
    859.77/1,289.73 = 243.48/x
  3. Step 3: Cross multiply
    859.77x = 1,289.73 × 243.48
  4. Step 4: Simplify right side
    859.77x = 314,023.46
  5. Step 5: Solve for x
    x = 314,023.46/859.77
  6. Step 6: Final answer
    x = 365.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.