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Finding the Fourth Proportional to 962.99, 1,328.92 and 520.89

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Solution

The fourth proportional to 962.99, 1,328.92 and 520.89 is: 718.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.99 : 1,328.92 = 520.89 : x
  2. Step 2: Convert to fraction form
    962.99/1,328.92 = 520.89/x
  3. Step 3: Cross multiply
    962.99x = 1,328.92 × 520.89
  4. Step 4: Simplify right side
    962.99x = 692,224.93
  5. Step 5: Solve for x
    x = 692,224.93/962.99
  6. Step 6: Final answer
    x = 718.83

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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.