Home / 3,130.40-4,695.60-2,938.40

Finding the Fourth Proportional to 3,130.40, 4,695.60 and 2,938.40

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Solution

The fourth proportional to 3,130.40, 4,695.60 and 2,938.40 is: 4,407.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.40 : 4,695.60 = 2,938.40 : x
  2. Step 2: Convert to fraction form
    3,130.40/4,695.60 = 2,938.40/x
  3. Step 3: Cross multiply
    3,130.40x = 4,695.60 × 2,938.40
  4. Step 4: Simplify right side
    3,130.40x = 13,797,551.04
  5. Step 5: Solve for x
    x = 13,797,551.04/3,130.40
  6. Step 6: Final answer
    x = 4,407.60

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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.