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Finding the Fourth Proportional to 642.53, 958.74 and 603.34

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Solution

The fourth proportional to 642.53, 958.74 and 603.34 is: 900.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.53 : 958.74 = 603.34 : x
  2. Step 2: Convert to fraction form
    642.53/958.74 = 603.34/x
  3. Step 3: Cross multiply
    642.53x = 958.74 × 603.34
  4. Step 4: Simplify right side
    642.53x = 578,446.19
  5. Step 5: Solve for x
    x = 578,446.19/642.53
  6. Step 6: Final answer
    x = 900.27

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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.