Home / 2,931.60-4,397.40-2,818.20

Finding the Fourth Proportional to 2,931.60, 4,397.40 and 2,818.20

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Solution

The fourth proportional to 2,931.60, 4,397.40 and 2,818.20 is: 4,227.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.60 : 4,397.40 = 2,818.20 : x
  2. Step 2: Convert to fraction form
    2,931.60/4,397.40 = 2,818.20/x
  3. Step 3: Cross multiply
    2,931.60x = 4,397.40 × 2,818.20
  4. Step 4: Simplify right side
    2,931.60x = 12,392,752.68
  5. Step 5: Solve for x
    x = 12,392,752.68/2,931.60
  6. Step 6: Final answer
    x = 4,227.30

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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.