Home / 2,490.36-3,737.40-931.80

Finding the Fourth Proportional to 2,490.36, 3,737.40 and 931.80

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Solution

The fourth proportional to 2,490.36, 3,737.40 and 931.80 is: 1,398.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,490.36 : 3,737.40 = 931.80 : x
  2. Step 2: Convert to fraction form
    2,490.36/3,737.40 = 931.80/x
  3. Step 3: Cross multiply
    2,490.36x = 3,737.40 × 931.80
  4. Step 4: Simplify right side
    2,490.36x = 3,482,509.32
  5. Step 5: Solve for x
    x = 3,482,509.32/2,490.36
  6. Step 6: Final answer
    x = 1,398.40

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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.