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Finding the Fourth Proportional to 621, 935.76 and 554.72

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Solution

The fourth proportional to 621, 935.76 and 554.72 is: 835.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    621 : 935.76 = 554.72 : x
  2. Step 2: Convert to fraction form
    621/935.76 = 554.72/x
  3. Step 3: Cross multiply
    621x = 935.76 × 554.72
  4. Step 4: Simplify right side
    621x = 519,084.79
  5. Step 5: Solve for x
    x = 519,084.79/621
  6. Step 6: Final answer
    x = 835.89

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.