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Finding the Fourth Proportional to 1,036.53, 1,554.39 and 459

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Solution

The fourth proportional to 1,036.53, 1,554.39 and 459 is: 688.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.53 : 1,554.39 = 459 : x
  2. Step 2: Convert to fraction form
    1,036.53/1,554.39 = 459/x
  3. Step 3: Cross multiply
    1,036.53x = 1,554.39 × 459
  4. Step 4: Simplify right side
    1,036.53x = 713,465.01
  5. Step 5: Solve for x
    x = 713,465.01/1,036.53
  6. Step 6: Final answer
    x = 688.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.