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Finding the Fourth Proportional to 1,562.05, 2,343.35 and 638.11

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Solution

The fourth proportional to 1,562.05, 2,343.35 and 638.11 is: 957.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,562.05 : 2,343.35 = 638.11 : x
  2. Step 2: Convert to fraction form
    1,562.05/2,343.35 = 638.11/x
  3. Step 3: Cross multiply
    1,562.05x = 2,343.35 × 638.11
  4. Step 4: Simplify right side
    1,562.05x = 1,495,315.07
  5. Step 5: Solve for x
    x = 1,495,315.07/1,562.05
  6. Step 6: Final answer
    x = 957.28

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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.