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Finding the Fourth Proportional to 698.99, 964.64 and 404.34

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Solution

The fourth proportional to 698.99, 964.64 and 404.34 is: 558.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.99 : 964.64 = 404.34 : x
  2. Step 2: Convert to fraction form
    698.99/964.64 = 404.34/x
  3. Step 3: Cross multiply
    698.99x = 964.64 × 404.34
  4. Step 4: Simplify right side
    698.99x = 390,040.52
  5. Step 5: Solve for x
    x = 390,040.52/698.99
  6. Step 6: Final answer
    x = 558.01

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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.