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Finding the Fourth Proportional to 963.03, 1,328.99 and 520.93

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Solution

The fourth proportional to 963.03, 1,328.99 and 520.93 is: 718.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    963.03 : 1,328.99 = 520.93 : x
  2. Step 2: Convert to fraction form
    963.03/1,328.99 = 520.93/x
  3. Step 3: Cross multiply
    963.03x = 1,328.99 × 520.93
  4. Step 4: Simplify right side
    963.03x = 692,310.76
  5. Step 5: Solve for x
    x = 692,310.76/963.03
  6. Step 6: Final answer
    x = 718.89

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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.