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Finding the Fourth Proportional to 646.28, 890.16 and 535.40

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Solution

The fourth proportional to 646.28, 890.16 and 535.40 is: 737.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.28 : 890.16 = 535.40 : x
  2. Step 2: Convert to fraction form
    646.28/890.16 = 535.40/x
  3. Step 3: Cross multiply
    646.28x = 890.16 × 535.40
  4. Step 4: Simplify right side
    646.28x = 476,591.66
  5. Step 5: Solve for x
    x = 476,591.66/646.28
  6. Step 6: Final answer
    x = 737.44

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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.