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Finding the Fourth Proportional to 1,401.79, 2,102.93 and 579.60

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Solution

The fourth proportional to 1,401.79, 2,102.93 and 579.60 is: 869.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.79 : 2,102.93 = 579.60 : x
  2. Step 2: Convert to fraction form
    1,401.79/2,102.93 = 579.60/x
  3. Step 3: Cross multiply
    1,401.79x = 2,102.93 × 579.60
  4. Step 4: Simplify right side
    1,401.79x = 1,218,861.22
  5. Step 5: Solve for x
    x = 1,218,861.22/1,401.79
  6. Step 6: Final answer
    x = 869.50

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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.