Home / 2,478.84-3,720.42-1,325.40

Finding the Fourth Proportional to 2,478.84, 3,720.42 and 1,325.40

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Solution

The fourth proportional to 2,478.84, 3,720.42 and 1,325.40 is: 1,989.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,478.84 : 3,720.42 = 1,325.40 : x
  2. Step 2: Convert to fraction form
    2,478.84/3,720.42 = 1,325.40/x
  3. Step 3: Cross multiply
    2,478.84x = 3,720.42 × 1,325.40
  4. Step 4: Simplify right side
    2,478.84x = 4,931,044.67
  5. Step 5: Solve for x
    x = 4,931,044.67/2,478.84
  6. Step 6: Final answer
    x = 1,989.25

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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.