Home / 4,230.40-6,345.60-2,918.20

Finding the Fourth Proportional to 4,230.40, 6,345.60 and 2,918.20

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Solution

The fourth proportional to 4,230.40, 6,345.60 and 2,918.20 is: 4,377.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,230.40 : 6,345.60 = 2,918.20 : x
  2. Step 2: Convert to fraction form
    4,230.40/6,345.60 = 2,918.20/x
  3. Step 3: Cross multiply
    4,230.40x = 6,345.60 × 2,918.20
  4. Step 4: Simplify right side
    4,230.40x = 18,517,729.92
  5. Step 5: Solve for x
    x = 18,517,729.92/4,230.40
  6. Step 6: Final answer
    x = 4,377.30

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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.