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Finding the Fourth Proportional to 555.34, 766.20 and 322.42

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Solution

The fourth proportional to 555.34, 766.20 and 322.42 is: 444.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.34 : 766.20 = 322.42 : x
  2. Step 2: Convert to fraction form
    555.34/766.20 = 322.42/x
  3. Step 3: Cross multiply
    555.34x = 766.20 × 322.42
  4. Step 4: Simplify right side
    555.34x = 247,038.20
  5. Step 5: Solve for x
    x = 247,038.20/555.34
  6. Step 6: Final answer
    x = 444.84

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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.