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Finding the Fourth Proportional to 1,561.48, 2,342.20 and 465.85

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Solution

The fourth proportional to 1,561.48, 2,342.20 and 465.85 is: 698.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.48 : 2,342.20 = 465.85 : x
  2. Step 2: Convert to fraction form
    1,561.48/2,342.20 = 465.85/x
  3. Step 3: Cross multiply
    1,561.48x = 2,342.20 × 465.85
  4. Step 4: Simplify right side
    1,561.48x = 1,091,116.51
  5. Step 5: Solve for x
    x = 1,091,116.51/1,561.48
  6. Step 6: Final answer
    x = 698.77

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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.