Home / 2,319.18-3,476.34-857.40

Finding the Fourth Proportional to 2,319.18, 3,476.34 and 857.40

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Solution

The fourth proportional to 2,319.18, 3,476.34 and 857.40 is: 1,285.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,319.18 : 3,476.34 = 857.40 : x
  2. Step 2: Convert to fraction form
    2,319.18/3,476.34 = 857.40/x
  3. Step 3: Cross multiply
    2,319.18x = 3,476.34 × 857.40
  4. Step 4: Simplify right side
    2,319.18x = 2,980,613.92
  5. Step 5: Solve for x
    x = 2,980,613.92/2,319.18
  6. Step 6: Final answer
    x = 1,285.20

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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.