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Finding the Fourth Proportional to 1,561.85, 2,342.67 and 637.16

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Solution

The fourth proportional to 1,561.85, 2,342.67 and 637.16 is: 955.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,561.85 : 2,342.67 = 637.16 : x
  2. Step 2: Convert to fraction form
    1,561.85/2,342.67 = 637.16/x
  3. Step 3: Cross multiply
    1,561.85x = 2,342.67 × 637.16
  4. Step 4: Simplify right side
    1,561.85x = 1,492,643.90
  5. Step 5: Solve for x
    x = 1,492,643.90/1,561.85
  6. Step 6: Final answer
    x = 955.69

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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.