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Finding the Fourth Proportional to 621.53, 931.58 and 549.53

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Solution

The fourth proportional to 621.53, 931.58 and 549.53 is: 823.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.53 : 931.58 = 549.53 : x
  2. Step 2: Convert to fraction form
    621.53/931.58 = 549.53/x
  3. Step 3: Cross multiply
    621.53x = 931.58 × 549.53
  4. Step 4: Simplify right side
    621.53x = 511,928.41
  5. Step 5: Solve for x
    x = 511,928.41/621.53
  6. Step 6: Final answer
    x = 823.66

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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.