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Finding the Fourth Proportional to 1,612.87, 2,415.42 and 917.43

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Solution

The fourth proportional to 1,612.87, 2,415.42 and 917.43 is: 1,373.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,612.87 : 2,415.42 = 917.43 : x
  2. Step 2: Convert to fraction form
    1,612.87/2,415.42 = 917.43/x
  3. Step 3: Cross multiply
    1,612.87x = 2,415.42 × 917.43
  4. Step 4: Simplify right side
    1,612.87x = 2,215,984.46
  5. Step 5: Solve for x
    x = 2,215,984.46/1,612.87
  6. Step 6: Final answer
    x = 1,373.93

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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.