Home / 2,119.99-2,925.58-1,223.90

Finding the Fourth Proportional to 2,119.99, 2,925.58 and 1,223.90

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Solution

The fourth proportional to 2,119.99, 2,925.58 and 1,223.90 is: 1,688.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.99 : 2,925.58 = 1,223.90 : x
  2. Step 2: Convert to fraction form
    2,119.99/2,925.58 = 1,223.90/x
  3. Step 3: Cross multiply
    2,119.99x = 2,925.58 × 1,223.90
  4. Step 4: Simplify right side
    2,119.99x = 3,580,617.36
  5. Step 5: Solve for x
    x = 3,580,617.36/2,119.99
  6. Step 6: Final answer
    x = 1,688.98

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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.