Home / 1,040.33-1,560.50-390.60

Finding the Fourth Proportional to 1,040.33, 1,560.50 and 390.60

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Solution

The fourth proportional to 1,040.33, 1,560.50 and 390.60 is: 585.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.33 : 1,560.50 = 390.60 : x
  2. Step 2: Convert to fraction form
    1,040.33/1,560.50 = 390.60/x
  3. Step 3: Cross multiply
    1,040.33x = 1,560.50 × 390.60
  4. Step 4: Simplify right side
    1,040.33x = 609,529.35
  5. Step 5: Solve for x
    x = 609,529.35/1,040.33
  6. Step 6: Final answer
    x = 585.90

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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.