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Finding the Fourth Proportional to 1,036.93, 1,554.52 and 421.06

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Solution

The fourth proportional to 1,036.93, 1,554.52 and 421.06 is: 631.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.93 : 1,554.52 = 421.06 : x
  2. Step 2: Convert to fraction form
    1,036.93/1,554.52 = 421.06/x
  3. Step 3: Cross multiply
    1,036.93x = 1,554.52 × 421.06
  4. Step 4: Simplify right side
    1,036.93x = 654,544.09
  5. Step 5: Solve for x
    x = 654,544.09/1,036.93
  6. Step 6: Final answer
    x = 631.24

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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.