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Finding the Fourth Proportional to 776.18, 1,164.39 and 365.36

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Solution

The fourth proportional to 776.18, 1,164.39 and 365.36 is: 548.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    776.18 : 1,164.39 = 365.36 : x
  2. Step 2: Convert to fraction form
    776.18/1,164.39 = 365.36/x
  3. Step 3: Cross multiply
    776.18x = 1,164.39 × 365.36
  4. Step 4: Simplify right side
    776.18x = 425,417.71
  5. Step 5: Solve for x
    x = 425,417.71/776.18
  6. Step 6: Final answer
    x = 548.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.