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Finding the Fourth Proportional to 1,087.58, 1,499.84 and 817.32

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Solution

The fourth proportional to 1,087.58, 1,499.84 and 817.32 is: 1,127.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.58 : 1,499.84 = 817.32 : x
  2. Step 2: Convert to fraction form
    1,087.58/1,499.84 = 817.32/x
  3. Step 3: Cross multiply
    1,087.58x = 1,499.84 × 817.32
  4. Step 4: Simplify right side
    1,087.58x = 1,225,849.23
  5. Step 5: Solve for x
    x = 1,225,849.23/1,087.58
  6. Step 6: Final answer
    x = 1,127.13

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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.