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Finding the Fourth Proportional to 715.76, 989.58 and 550.52

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Solution

The fourth proportional to 715.76, 989.58 and 550.52 is: 761.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.76 : 989.58 = 550.52 : x
  2. Step 2: Convert to fraction form
    715.76/989.58 = 550.52/x
  3. Step 3: Cross multiply
    715.76x = 989.58 × 550.52
  4. Step 4: Simplify right side
    715.76x = 544,783.58
  5. Step 5: Solve for x
    x = 544,783.58/715.76
  6. Step 6: Final answer
    x = 761.13

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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.