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Finding the Fourth Proportional to 693.99, 955.15 and 553.66

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Solution

The fourth proportional to 693.99, 955.15 and 553.66 is: 762.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.99 : 955.15 = 553.66 : x
  2. Step 2: Convert to fraction form
    693.99/955.15 = 553.66/x
  3. Step 3: Cross multiply
    693.99x = 955.15 × 553.66
  4. Step 4: Simplify right side
    693.99x = 528,828.35
  5. Step 5: Solve for x
    x = 528,828.35/693.99
  6. Step 6: Final answer
    x = 762.01

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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.