Home / 3,117.60-4,676.40-1,870.20

Finding the Fourth Proportional to 3,117.60, 4,676.40 and 1,870.20

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Solution

The fourth proportional to 3,117.60, 4,676.40 and 1,870.20 is: 2,805.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.60 : 4,676.40 = 1,870.20 : x
  2. Step 2: Convert to fraction form
    3,117.60/4,676.40 = 1,870.20/x
  3. Step 3: Cross multiply
    3,117.60x = 4,676.40 × 1,870.20
  4. Step 4: Simplify right side
    3,117.60x = 8,745,803.28
  5. Step 5: Solve for x
    x = 8,745,803.28/3,117.60
  6. Step 6: Final answer
    x = 2,805.30

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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.