Home / 1,621.55-2,430.27-881.13

Finding the Fourth Proportional to 1,621.55, 2,430.27 and 881.13

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Solution

The fourth proportional to 1,621.55, 2,430.27 and 881.13 is: 1,320.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.55 : 2,430.27 = 881.13 : x
  2. Step 2: Convert to fraction form
    1,621.55/2,430.27 = 881.13/x
  3. Step 3: Cross multiply
    1,621.55x = 2,430.27 × 881.13
  4. Step 4: Simplify right side
    1,621.55x = 2,141,369.45
  5. Step 5: Solve for x
    x = 2,141,369.45/1,621.55
  6. Step 6: Final answer
    x = 1,320.57

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1.5x scale

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.