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Finding the Fourth Proportional to 520.12, 780.36 and 374.26

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Solution

The fourth proportional to 520.12, 780.36 and 374.26 is: 561.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.12 : 780.36 = 374.26 : x
  2. Step 2: Convert to fraction form
    520.12/780.36 = 374.26/x
  3. Step 3: Cross multiply
    520.12x = 780.36 × 374.26
  4. Step 4: Simplify right side
    520.12x = 292,057.53
  5. Step 5: Solve for x
    x = 292,057.53/520.12
  6. Step 6: Final answer
    x = 561.52

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.