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Finding the Fourth Proportional to 771.62, 1,064.75 and 440.01

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Solution

The fourth proportional to 771.62, 1,064.75 and 440.01 is: 607.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    771.62 : 1,064.75 = 440.01 : x
  2. Step 2: Convert to fraction form
    771.62/1,064.75 = 440.01/x
  3. Step 3: Cross multiply
    771.62x = 1,064.75 × 440.01
  4. Step 4: Simplify right side
    771.62x = 468,498.45
  5. Step 5: Solve for x
    x = 468,498.45/771.62
  6. Step 6: Final answer
    x = 607.17

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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.