Home / 1,285.24-1,773.18-761.20

Finding the Fourth Proportional to 1,285.24, 1,773.18 and 761.20

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Solution

The fourth proportional to 1,285.24, 1,773.18 and 761.20 is: 1,050.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.24 : 1,773.18 = 761.20 : x
  2. Step 2: Convert to fraction form
    1,285.24/1,773.18 = 761.20/x
  3. Step 3: Cross multiply
    1,285.24x = 1,773.18 × 761.20
  4. Step 4: Simplify right side
    1,285.24x = 1,349,744.62
  5. Step 5: Solve for x
    x = 1,349,744.62/1,285.24
  6. Step 6: Final answer
    x = 1,050.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.