Home / 2,690.72-4,036.16-1,047.20

Finding the Fourth Proportional to 2,690.72, 4,036.16 and 1,047.20

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Solution

The fourth proportional to 2,690.72, 4,036.16 and 1,047.20 is: 1,570.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.72 : 4,036.16 = 1,047.20 : x
  2. Step 2: Convert to fraction form
    2,690.72/4,036.16 = 1,047.20/x
  3. Step 3: Cross multiply
    2,690.72x = 4,036.16 × 1,047.20
  4. Step 4: Simplify right side
    2,690.72x = 4,226,666.75
  5. Step 5: Solve for x
    x = 4,226,666.75/2,690.72
  6. Step 6: Final answer
    x = 1,570.83

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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.