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Finding the Fourth Proportional to 1,406.89, 2,110.68 and 432.96

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Solution

The fourth proportional to 1,406.89, 2,110.68 and 432.96 is: 649.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,406.89 : 2,110.68 = 432.96 : x
  2. Step 2: Convert to fraction form
    1,406.89/2,110.68 = 432.96/x
  3. Step 3: Cross multiply
    1,406.89x = 2,110.68 × 432.96
  4. Step 4: Simplify right side
    1,406.89x = 913,840.01
  5. Step 5: Solve for x
    x = 913,840.01/1,406.89
  6. Step 6: Final answer
    x = 649.55

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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.