Home / 5,145.60-7,718.40-3,298.80

Finding the Fourth Proportional to 5,145.60, 7,718.40 and 3,298.80

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Solution

The fourth proportional to 5,145.60, 7,718.40 and 3,298.80 is: 4,948.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.60 : 7,718.40 = 3,298.80 : x
  2. Step 2: Convert to fraction form
    5,145.60/7,718.40 = 3,298.80/x
  3. Step 3: Cross multiply
    5,145.60x = 7,718.40 × 3,298.80
  4. Step 4: Simplify right side
    5,145.60x = 25,461,457.92
  5. Step 5: Solve for x
    x = 25,461,457.92/5,145.60
  6. Step 6: Final answer
    x = 4,948.20

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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.