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Finding the Fourth Proportional to 1,214.34, 1,675.46 and 742.28

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Solution

The fourth proportional to 1,214.34, 1,675.46 and 742.28 is: 1,024.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,214.34 : 1,675.46 = 742.28 : x
  2. Step 2: Convert to fraction form
    1,214.34/1,675.46 = 742.28/x
  3. Step 3: Cross multiply
    1,214.34x = 1,675.46 × 742.28
  4. Step 4: Simplify right side
    1,214.34x = 1,243,648.36
  5. Step 5: Solve for x
    x = 1,243,648.36/1,214.34
  6. Step 6: Final answer
    x = 1,024.14

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1.5x scale

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.