Home / 1,220.10-1,829.46-387.01

Finding the Fourth Proportional to 1,220.10, 1,829.46 and 387.01

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Solution

The fourth proportional to 1,220.10, 1,829.46 and 387.01 is: 580.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.10 : 1,829.46 = 387.01 : x
  2. Step 2: Convert to fraction form
    1,220.10/1,829.46 = 387.01/x
  3. Step 3: Cross multiply
    1,220.10x = 1,829.46 × 387.01
  4. Step 4: Simplify right side
    1,220.10x = 708,021.96
  5. Step 5: Solve for x
    x = 708,021.96/1,220.10
  6. Step 6: Final answer
    x = 580.30

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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.