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Finding the Fourth Proportional to 962.63, 1,328.43 and 520.53

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Solution

The fourth proportional to 962.63, 1,328.43 and 520.53 is: 718.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.63 : 1,328.43 = 520.53 : x
  2. Step 2: Convert to fraction form
    962.63/1,328.43 = 520.53/x
  3. Step 3: Cross multiply
    962.63x = 1,328.43 × 520.53
  4. Step 4: Simplify right side
    962.63x = 691,492.92
  5. Step 5: Solve for x
    x = 691,492.92/962.63
  6. Step 6: Final answer
    x = 718.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.