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Finding the Fourth Proportional to 962.72, 1,328.58 and 564.63

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Solution

The fourth proportional to 962.72, 1,328.58 and 564.63 is: 779.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.72 : 1,328.58 = 564.63 : x
  2. Step 2: Convert to fraction form
    962.72/1,328.58 = 564.63/x
  3. Step 3: Cross multiply
    962.72x = 1,328.58 × 564.63
  4. Step 4: Simplify right side
    962.72x = 750,156.13
  5. Step 5: Solve for x
    x = 750,156.13/962.72
  6. Step 6: Final answer
    x = 779.20

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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.