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Finding the Fourth Proportional to 962.04, 1,328.72 and 646.80

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Solution

The fourth proportional to 962.04, 1,328.72 and 646.80 is: 893.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.04 : 1,328.72 = 646.80 : x
  2. Step 2: Convert to fraction form
    962.04/1,328.72 = 646.80/x
  3. Step 3: Cross multiply
    962.04x = 1,328.72 × 646.80
  4. Step 4: Simplify right side
    962.04x = 859,416.10
  5. Step 5: Solve for x
    x = 859,416.10/962.04
  6. Step 6: Final answer
    x = 893.33

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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.