Home / 1,036.60-1,554.96-420.28

Finding the Fourth Proportional to 1,036.60, 1,554.96 and 420.28

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Solution

The fourth proportional to 1,036.60, 1,554.96 and 420.28 is: 630.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.60 : 1,554.96 = 420.28 : x
  2. Step 2: Convert to fraction form
    1,036.60/1,554.96 = 420.28/x
  3. Step 3: Cross multiply
    1,036.60x = 1,554.96 × 420.28
  4. Step 4: Simplify right side
    1,036.60x = 653,518.59
  5. Step 5: Solve for x
    x = 653,518.59/1,036.60
  6. Step 6: Final answer
    x = 630.44

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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.