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Finding the Fourth Proportional to 977.49, 1,348.49 and 563.25

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Solution

The fourth proportional to 977.49, 1,348.49 and 563.25 is: 777.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.49 : 1,348.49 = 563.25 : x
  2. Step 2: Convert to fraction form
    977.49/1,348.49 = 563.25/x
  3. Step 3: Cross multiply
    977.49x = 1,348.49 × 563.25
  4. Step 4: Simplify right side
    977.49x = 759,534.18
  5. Step 5: Solve for x
    x = 759,534.18/977.49
  6. Step 6: Final answer
    x = 777.03

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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.