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Finding the Fourth Proportional to 1,420.79, 2,131.19 and 599.66

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Solution

The fourth proportional to 1,420.79, 2,131.19 and 599.66 is: 899.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.79 : 2,131.19 = 599.66 : x
  2. Step 2: Convert to fraction form
    1,420.79/2,131.19 = 599.66/x
  3. Step 3: Cross multiply
    1,420.79x = 2,131.19 × 599.66
  4. Step 4: Simplify right side
    1,420.79x = 1,277,975.74
  5. Step 5: Solve for x
    x = 1,277,975.74/1,420.79
  6. Step 6: Final answer
    x = 899.49

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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.