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Finding the Fourth Proportional to 1,056.66, 1,458.03 and 663.81

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Solution

The fourth proportional to 1,056.66, 1,458.03 and 663.81 is: 915.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,056.66 : 1,458.03 = 663.81 : x
  2. Step 2: Convert to fraction form
    1,056.66/1,458.03 = 663.81/x
  3. Step 3: Cross multiply
    1,056.66x = 1,458.03 × 663.81
  4. Step 4: Simplify right side
    1,056.66x = 967,854.89
  5. Step 5: Solve for x
    x = 967,854.89/1,056.66
  6. Step 6: Final answer
    x = 915.96

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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.