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Finding the Fourth Proportional to 1,429.74, 2,142.54 and 607.56

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Solution

The fourth proportional to 1,429.74, 2,142.54 and 607.56 is: 910.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.74 : 2,142.54 = 607.56 : x
  2. Step 2: Convert to fraction form
    1,429.74/2,142.54 = 607.56/x
  3. Step 3: Cross multiply
    1,429.74x = 2,142.54 × 607.56
  4. Step 4: Simplify right side
    1,429.74x = 1,301,721.60
  5. Step 5: Solve for x
    x = 1,301,721.60/1,429.74
  6. Step 6: Final answer
    x = 910.46

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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.