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Finding the Fourth Proportional to 1,601.79, 2,401.80 and 561.48

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Solution

The fourth proportional to 1,601.79, 2,401.80 and 561.48 is: 841.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,601.79 : 2,401.80 = 561.48 : x
  2. Step 2: Convert to fraction form
    1,601.79/2,401.80 = 561.48/x
  3. Step 3: Cross multiply
    1,601.79x = 2,401.80 × 561.48
  4. Step 4: Simplify right side
    1,601.79x = 1,348,562.66
  5. Step 5: Solve for x
    x = 1,348,562.66/1,601.79
  6. Step 6: Final answer
    x = 841.91

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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.