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Finding the Fourth Proportional to 1,406.62, 2,109.93 and 432.73

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Solution

The fourth proportional to 1,406.62, 2,109.93 and 432.73 is: 649.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,406.62 : 2,109.93 = 432.73 : x
  2. Step 2: Convert to fraction form
    1,406.62/2,109.93 = 432.73/x
  3. Step 3: Cross multiply
    1,406.62x = 2,109.93 × 432.73
  4. Step 4: Simplify right side
    1,406.62x = 913,030.01
  5. Step 5: Solve for x
    x = 913,030.01/1,406.62
  6. Step 6: Final answer
    x = 649.10

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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.