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Finding the Fourth Proportional to 621.38, 857.52 and 341.63

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Solution

The fourth proportional to 621.38, 857.52 and 341.63 is: 471.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.38 : 857.52 = 341.63 : x
  2. Step 2: Convert to fraction form
    621.38/857.52 = 341.63/x
  3. Step 3: Cross multiply
    621.38x = 857.52 × 341.63
  4. Step 4: Simplify right side
    621.38x = 292,950.27
  5. Step 5: Solve for x
    x = 292,950.27/621.38
  6. Step 6: Final answer
    x = 471.45

Related Problems

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Half scale
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Double scale
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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.