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Finding the Fourth Proportional to 642.73, 957.46 and 602.89

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Solution

The fourth proportional to 642.73, 957.46 and 602.89 is: 898.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.73 : 957.46 = 602.89 : x
  2. Step 2: Convert to fraction form
    642.73/957.46 = 602.89/x
  3. Step 3: Cross multiply
    642.73x = 957.46 × 602.89
  4. Step 4: Simplify right side
    642.73x = 577,244.57
  5. Step 5: Solve for x
    x = 577,244.57/642.73
  6. Step 6: Final answer
    x = 898.11

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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.