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Finding the Fourth Proportional to 551.34, 761.64 and 440.67

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Solution

The fourth proportional to 551.34, 761.64 and 440.67 is: 608.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.34 : 761.64 = 440.67 : x
  2. Step 2: Convert to fraction form
    551.34/761.64 = 440.67/x
  3. Step 3: Cross multiply
    551.34x = 761.64 × 440.67
  4. Step 4: Simplify right side
    551.34x = 335,631.90
  5. Step 5: Solve for x
    x = 335,631.90/551.34
  6. Step 6: Final answer
    x = 608.76

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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.