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Finding the Fourth Proportional to 1,056.82, 1,458.74 and 664.18

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Solution

The fourth proportional to 1,056.82, 1,458.74 and 664.18 is: 916.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,056.82 : 1,458.74 = 664.18 : x
  2. Step 2: Convert to fraction form
    1,056.82/1,458.74 = 664.18/x
  3. Step 3: Cross multiply
    1,056.82x = 1,458.74 × 664.18
  4. Step 4: Simplify right side
    1,056.82x = 968,865.93
  5. Step 5: Solve for x
    x = 968,865.93/1,056.82
  6. Step 6: Final answer
    x = 916.77

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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.