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Finding the Fourth Proportional to 1,353.68, 2,030.82 and 429.52

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Solution

The fourth proportional to 1,353.68, 2,030.82 and 429.52 is: 644.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.68 : 2,030.82 = 429.52 : x
  2. Step 2: Convert to fraction form
    1,353.68/2,030.82 = 429.52/x
  3. Step 3: Cross multiply
    1,353.68x = 2,030.82 × 429.52
  4. Step 4: Simplify right side
    1,353.68x = 872,277.81
  5. Step 5: Solve for x
    x = 872,277.81/1,353.68
  6. Step 6: Final answer
    x = 644.38

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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.