Home / 4,220.80-5,818.70-2,892.40

Finding the Fourth Proportional to 4,220.80, 5,818.70 and 2,892.40

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Solution

The fourth proportional to 4,220.80, 5,818.70 and 2,892.40 is: 3,987.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,220.80 : 5,818.70 = 2,892.40 : x
  2. Step 2: Convert to fraction form
    4,220.80/5,818.70 = 2,892.40/x
  3. Step 3: Cross multiply
    4,220.80x = 5,818.70 × 2,892.40
  4. Step 4: Simplify right side
    4,220.80x = 16,830,007.88
  5. Step 5: Solve for x
    x = 16,830,007.88/4,220.80
  6. Step 6: Final answer
    x = 3,987.40

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.