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Finding the Fourth Proportional to 1,676.11, 2,312.91 and 930.02

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Solution

The fourth proportional to 1,676.11, 2,312.91 and 930.02 is: 1,283.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,676.11 : 2,312.91 = 930.02 : x
  2. Step 2: Convert to fraction form
    1,676.11/2,312.91 = 930.02/x
  3. Step 3: Cross multiply
    1,676.11x = 2,312.91 × 930.02
  4. Step 4: Simplify right side
    1,676.11x = 2,151,047.37
  5. Step 5: Solve for x
    x = 2,151,047.37/1,676.11
  6. Step 6: Final answer
    x = 1,283.36

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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.