Home / 1,563.30-2,343.08-638.36

Finding the Fourth Proportional to 1,563.30, 2,343.08 and 638.36

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Solution

The fourth proportional to 1,563.30, 2,343.08 and 638.36 is: 956.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.30 : 2,343.08 = 638.36 : x
  2. Step 2: Convert to fraction form
    1,563.30/2,343.08 = 638.36/x
  3. Step 3: Cross multiply
    1,563.30x = 2,343.08 × 638.36
  4. Step 4: Simplify right side
    1,563.30x = 1,495,728.55
  5. Step 5: Solve for x
    x = 1,495,728.55/1,563.30
  6. Step 6: Final answer
    x = 956.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.