Home / 2,130.84-2,941.32-1,291.20

Finding the Fourth Proportional to 2,130.84, 2,941.32 and 1,291.20

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Solution

The fourth proportional to 2,130.84, 2,941.32 and 1,291.20 is: 1,782.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.84 : 2,941.32 = 1,291.20 : x
  2. Step 2: Convert to fraction form
    2,130.84/2,941.32 = 1,291.20/x
  3. Step 3: Cross multiply
    2,130.84x = 2,941.32 × 1,291.20
  4. Step 4: Simplify right side
    2,130.84x = 3,797,832.38
  5. Step 5: Solve for x
    x = 3,797,832.38/2,130.84
  6. Step 6: Final answer
    x = 1,782.32

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1.5x scale

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.