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Finding the Fourth Proportional to 2,779.12, 4,167.24 and 831.06

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Solution

The fourth proportional to 2,779.12, 4,167.24 and 831.06 is: 1,246.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,779.12 : 4,167.24 = 831.06 : x
  2. Step 2: Convert to fraction form
    2,779.12/4,167.24 = 831.06/x
  3. Step 3: Cross multiply
    2,779.12x = 4,167.24 × 831.06
  4. Step 4: Simplify right side
    2,779.12x = 3,463,226.47
  5. Step 5: Solve for x
    x = 3,463,226.47/2,779.12
  6. Step 6: Final answer
    x = 1,246.16

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1.5x scale

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.