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Finding the Fourth Proportional to 962.70, 1,328.30 and 569.64

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Solution

The fourth proportional to 962.70, 1,328.30 and 569.64 is: 785.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.70 : 1,328.30 = 569.64 : x
  2. Step 2: Convert to fraction form
    962.70/1,328.30 = 569.64/x
  3. Step 3: Cross multiply
    962.70x = 1,328.30 × 569.64
  4. Step 4: Simplify right side
    962.70x = 756,652.81
  5. Step 5: Solve for x
    x = 756,652.81/962.70
  6. Step 6: Final answer
    x = 785.97

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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.