Home / 2,957.60-4,436.40-1,920.80

Finding the Fourth Proportional to 2,957.60, 4,436.40 and 1,920.80

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Solution

The fourth proportional to 2,957.60, 4,436.40 and 1,920.80 is: 2,881.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,957.60 : 4,436.40 = 1,920.80 : x
  2. Step 2: Convert to fraction form
    2,957.60/4,436.40 = 1,920.80/x
  3. Step 3: Cross multiply
    2,957.60x = 4,436.40 × 1,920.80
  4. Step 4: Simplify right side
    2,957.60x = 8,521,437.12
  5. Step 5: Solve for x
    x = 8,521,437.12/2,957.60
  6. Step 6: Final answer
    x = 2,881.20

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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.