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Finding the Fourth Proportional to 520.58, 718.67 and 380.54

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Solution

The fourth proportional to 520.58, 718.67 and 380.54 is: 525.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.58 : 718.67 = 380.54 : x
  2. Step 2: Convert to fraction form
    520.58/718.67 = 380.54/x
  3. Step 3: Cross multiply
    520.58x = 718.67 × 380.54
  4. Step 4: Simplify right side
    520.58x = 273,482.68
  5. Step 5: Solve for x
    x = 273,482.68/520.58
  6. Step 6: Final answer
    x = 525.34

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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.