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Finding the Fourth Proportional to 1,262.16, 1,893.66 and 612.96

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Solution

The fourth proportional to 1,262.16, 1,893.66 and 612.96 is: 919.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.16 : 1,893.66 = 612.96 : x
  2. Step 2: Convert to fraction form
    1,262.16/1,893.66 = 612.96/x
  3. Step 3: Cross multiply
    1,262.16x = 1,893.66 × 612.96
  4. Step 4: Simplify right side
    1,262.16x = 1,160,737.83
  5. Step 5: Solve for x
    x = 1,160,737.83/1,262.16
  6. Step 6: Final answer
    x = 919.64

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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.