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Finding the Fourth Proportional to 1,011.32, 1,397.12 and 800.82

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Solution

The fourth proportional to 1,011.32, 1,397.12 and 800.82 is: 1,106.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.32 : 1,397.12 = 800.82 : x
  2. Step 2: Convert to fraction form
    1,011.32/1,397.12 = 800.82/x
  3. Step 3: Cross multiply
    1,011.32x = 1,397.12 × 800.82
  4. Step 4: Simplify right side
    1,011.32x = 1,118,837.63
  5. Step 5: Solve for x
    x = 1,118,837.63/1,011.32
  6. Step 6: Final answer
    x = 1,106.32

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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.