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Finding the Fourth Proportional to 716.86, 989.74 and 550.77

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Solution

The fourth proportional to 716.86, 989.74 and 550.77 is: 760.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.86 : 989.74 = 550.77 : x
  2. Step 2: Convert to fraction form
    716.86/989.74 = 550.77/x
  3. Step 3: Cross multiply
    716.86x = 989.74 × 550.77
  4. Step 4: Simplify right side
    716.86x = 545,119.10
  5. Step 5: Solve for x
    x = 545,119.10/716.86
  6. Step 6: Final answer
    x = 760.43

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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.