Home / 2,275.02-3,138.62-1,389.29

Finding the Fourth Proportional to 2,275.02, 3,138.62 and 1,389.29

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Solution

The fourth proportional to 2,275.02, 3,138.62 and 1,389.29 is: 1,916.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,275.02 : 3,138.62 = 1,389.29 : x
  2. Step 2: Convert to fraction form
    2,275.02/3,138.62 = 1,389.29/x
  3. Step 3: Cross multiply
    2,275.02x = 3,138.62 × 1,389.29
  4. Step 4: Simplify right side
    2,275.02x = 4,360,430.74
  5. Step 5: Solve for x
    x = 4,360,430.74/2,275.02
  6. Step 6: Final answer
    x = 1,916.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.