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Finding the Fourth Proportional to 2,415.43, 3,623.15 and 772.11

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Solution

The fourth proportional to 2,415.43, 3,623.15 and 772.11 is: 1,158.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,415.43 : 3,623.15 = 772.11 : x
  2. Step 2: Convert to fraction form
    2,415.43/3,623.15 = 772.11/x
  3. Step 3: Cross multiply
    2,415.43x = 3,623.15 × 772.11
  4. Step 4: Simplify right side
    2,415.43x = 2,797,457.74
  5. Step 5: Solve for x
    x = 2,797,457.74/2,415.43
  6. Step 6: Final answer
    x = 1,158.16

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1.5x scale

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.