Home / 1,040.18-1,560.48-390.92

Finding the Fourth Proportional to 1,040.18, 1,560.48 and 390.92

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Solution

The fourth proportional to 1,040.18, 1,560.48 and 390.92 is: 586.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.18 : 1,560.48 = 390.92 : x
  2. Step 2: Convert to fraction form
    1,040.18/1,560.48 = 390.92/x
  3. Step 3: Cross multiply
    1,040.18x = 1,560.48 × 390.92
  4. Step 4: Simplify right side
    1,040.18x = 610,016.02
  5. Step 5: Solve for x
    x = 610,016.02/1,040.18
  6. Step 6: Final answer
    x = 586.46

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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.