Home / 4,931.90-7,389.49-2,980

Finding the Fourth Proportional to 4,931.90, 7,389.49 and 2,980

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Solution

The fourth proportional to 4,931.90, 7,389.49 and 2,980 is: 4,464.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,931.90 : 7,389.49 = 2,980 : x
  2. Step 2: Convert to fraction form
    4,931.90/7,389.49 = 2,980/x
  3. Step 3: Cross multiply
    4,931.90x = 7,389.49 × 2,980
  4. Step 4: Simplify right side
    4,931.90x = 22,020,680.20
  5. Step 5: Solve for x
    x = 22,020,680.20/4,931.90
  6. Step 6: Final answer
    x = 4,464.95

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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.