Home / 1,040.08-1,560.30-309.70

Finding the Fourth Proportional to 1,040.08, 1,560.30 and 309.70

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Solution

The fourth proportional to 1,040.08, 1,560.30 and 309.70 is: 464.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.08 : 1,560.30 = 309.70 : x
  2. Step 2: Convert to fraction form
    1,040.08/1,560.30 = 309.70/x
  3. Step 3: Cross multiply
    1,040.08x = 1,560.30 × 309.70
  4. Step 4: Simplify right side
    1,040.08x = 483,224.91
  5. Step 5: Solve for x
    x = 483,224.91/1,040.08
  6. Step 6: Final answer
    x = 464.60

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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.