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Finding the Fourth Proportional to 641.72, 957.40 and 544.93

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Solution

The fourth proportional to 641.72, 957.40 and 544.93 is: 812.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.72 : 957.40 = 544.93 : x
  2. Step 2: Convert to fraction form
    641.72/957.40 = 544.93/x
  3. Step 3: Cross multiply
    641.72x = 957.40 × 544.93
  4. Step 4: Simplify right side
    641.72x = 521,715.29
  5. Step 5: Solve for x
    x = 521,715.29/641.72
  6. Step 6: Final answer
    x = 812.99

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.