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Finding the Fourth Proportional to 621.07, 931.74 and 374.49

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Solution

The fourth proportional to 621.07, 931.74 and 374.49 is: 561.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.07 : 931.74 = 374.49 : x
  2. Step 2: Convert to fraction form
    621.07/931.74 = 374.49/x
  3. Step 3: Cross multiply
    621.07x = 931.74 × 374.49
  4. Step 4: Simplify right side
    621.07x = 348,925.91
  5. Step 5: Solve for x
    x = 348,925.91/621.07
  6. Step 6: Final answer
    x = 561.82

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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.