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Finding the Fourth Proportional to 1,063.16, 1,466.57 and 665.09

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Solution

The fourth proportional to 1,063.16, 1,466.57 and 665.09 is: 917.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,063.16 : 1,466.57 = 665.09 : x
  2. Step 2: Convert to fraction form
    1,063.16/1,466.57 = 665.09/x
  3. Step 3: Cross multiply
    1,063.16x = 1,466.57 × 665.09
  4. Step 4: Simplify right side
    1,063.16x = 975,397.72
  5. Step 5: Solve for x
    x = 975,397.72/1,063.16
  6. Step 6: Final answer
    x = 917.45

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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.