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Finding the Fourth Proportional to 374.20, 515.10 and 354.76

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Solution

The fourth proportional to 374.20, 515.10 and 354.76 is: 488.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.20 : 515.10 = 354.76 : x
  2. Step 2: Convert to fraction form
    374.20/515.10 = 354.76/x
  3. Step 3: Cross multiply
    374.20x = 515.10 × 354.76
  4. Step 4: Simplify right side
    374.20x = 182,736.88
  5. Step 5: Solve for x
    x = 182,736.88/374.20
  6. Step 6: Final answer
    x = 488.34

Related Problems

Find fourth proportional to 187.10, 257.55 and 177.38
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.