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Finding the Fourth Proportional to 1,561.37, 2,342.50 and 465.78

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Solution

The fourth proportional to 1,561.37, 2,342.50 and 465.78 is: 698.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.37 : 2,342.50 = 465.78 : x
  2. Step 2: Convert to fraction form
    1,561.37/2,342.50 = 465.78/x
  3. Step 3: Cross multiply
    1,561.37x = 2,342.50 × 465.78
  4. Step 4: Simplify right side
    1,561.37x = 1,091,088.49
  5. Step 5: Solve for x
    x = 1,091,088.49/1,561.37
  6. Step 6: Final answer
    x = 698.80

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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.