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Finding the Fourth Proportional to 977.83, 1,348.06 and 662.60

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Solution

The fourth proportional to 977.83, 1,348.06 and 662.60 is: 913.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.83 : 1,348.06 = 662.60 : x
  2. Step 2: Convert to fraction form
    977.83/1,348.06 = 662.60/x
  3. Step 3: Cross multiply
    977.83x = 1,348.06 × 662.60
  4. Step 4: Simplify right side
    977.83x = 893,224.56
  5. Step 5: Solve for x
    x = 893,224.56/977.83
  6. Step 6: Final answer
    x = 913.48

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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.