Home / 1,561.21-2,341.67-521.17

Finding the Fourth Proportional to 1,561.21, 2,341.67 and 521.17

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Solution

The fourth proportional to 1,561.21, 2,341.67 and 521.17 is: 781.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.21 : 2,341.67 = 521.17 : x
  2. Step 2: Convert to fraction form
    1,561.21/2,341.67 = 521.17/x
  3. Step 3: Cross multiply
    1,561.21x = 2,341.67 × 521.17
  4. Step 4: Simplify right side
    1,561.21x = 1,220,405.55
  5. Step 5: Solve for x
    x = 1,220,405.55/1,561.21
  6. Step 6: Final answer
    x = 781.70

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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.