Home / 1,178.64-1,766.40-520.08

Finding the Fourth Proportional to 1,178.64, 1,766.40 and 520.08

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Solution

The fourth proportional to 1,178.64, 1,766.40 and 520.08 is: 779.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.64 : 1,766.40 = 520.08 : x
  2. Step 2: Convert to fraction form
    1,178.64/1,766.40 = 520.08/x
  3. Step 3: Cross multiply
    1,178.64x = 1,766.40 × 520.08
  4. Step 4: Simplify right side
    1,178.64x = 918,669.31
  5. Step 5: Solve for x
    x = 918,669.31/1,178.64
  6. Step 6: Final answer
    x = 779.43

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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.