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Finding the Fourth Proportional to 2,477.72, 3,418.74 and 1,681.66

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Solution

The fourth proportional to 2,477.72, 3,418.74 and 1,681.66 is: 2,320.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,477.72 : 3,418.74 = 1,681.66 : x
  2. Step 2: Convert to fraction form
    2,477.72/3,418.74 = 1,681.66/x
  3. Step 3: Cross multiply
    2,477.72x = 3,418.74 × 1,681.66
  4. Step 4: Simplify right side
    2,477.72x = 5,749,162.58
  5. Step 5: Solve for x
    x = 5,749,162.58/2,477.72
  6. Step 6: Final answer
    x = 2,320.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.