Home / 1,036.29-1,554.38-420.05

Finding the Fourth Proportional to 1,036.29, 1,554.38 and 420.05

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Solution

The fourth proportional to 1,036.29, 1,554.38 and 420.05 is: 630.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.29 : 1,554.38 = 420.05 : x
  2. Step 2: Convert to fraction form
    1,036.29/1,554.38 = 420.05/x
  3. Step 3: Cross multiply
    1,036.29x = 1,554.38 × 420.05
  4. Step 4: Simplify right side
    1,036.29x = 652,913.53
  5. Step 5: Solve for x
    x = 652,913.53/1,036.29
  6. Step 6: Final answer
    x = 630.05

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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.