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Finding the Fourth Proportional to 1,812.40, 2,712.20 and 1,658.80

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Solution

The fourth proportional to 1,812.40, 2,712.20 and 1,658.80 is: 2,482.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.40 : 2,712.20 = 1,658.80 : x
  2. Step 2: Convert to fraction form
    1,812.40/2,712.20 = 1,658.80/x
  3. Step 3: Cross multiply
    1,812.40x = 2,712.20 × 1,658.80
  4. Step 4: Simplify right side
    1,812.40x = 4,498,997.36
  5. Step 5: Solve for x
    x = 4,498,997.36/1,812.40
  6. Step 6: Final answer
    x = 2,482.34

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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.