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Finding the Fourth Proportional to 962.55, 1,328.32 and 520.45

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Solution

The fourth proportional to 962.55, 1,328.32 and 520.45 is: 718.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.55 : 1,328.32 = 520.45 : x
  2. Step 2: Convert to fraction form
    962.55/1,328.32 = 520.45/x
  3. Step 3: Cross multiply
    962.55x = 1,328.32 × 520.45
  4. Step 4: Simplify right side
    962.55x = 691,328.95
  5. Step 5: Solve for x
    x = 691,328.95/962.55
  6. Step 6: Final answer
    x = 718.23

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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.