Home / 2,685.60-4,024.80-1,915.20

Finding the Fourth Proportional to 2,685.60, 4,024.80 and 1,915.20

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Solution

The fourth proportional to 2,685.60, 4,024.80 and 1,915.20 is: 2,870.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.60 : 4,024.80 = 1,915.20 : x
  2. Step 2: Convert to fraction form
    2,685.60/4,024.80 = 1,915.20/x
  3. Step 3: Cross multiply
    2,685.60x = 4,024.80 × 1,915.20
  4. Step 4: Simplify right side
    2,685.60x = 7,708,296.96
  5. Step 5: Solve for x
    x = 7,708,296.96/2,685.60
  6. Step 6: Final answer
    x = 2,870.23

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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.