Home / 830.24-1,145.26-519.20

Finding the Fourth Proportional to 830.24, 1,145.26 and 519.20

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Solution

The fourth proportional to 830.24, 1,145.26 and 519.20 is: 716.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.24 : 1,145.26 = 519.20 : x
  2. Step 2: Convert to fraction form
    830.24/1,145.26 = 519.20/x
  3. Step 3: Cross multiply
    830.24x = 1,145.26 × 519.20
  4. Step 4: Simplify right side
    830.24x = 594,618.99
  5. Step 5: Solve for x
    x = 594,618.99/830.24
  6. Step 6: Final answer
    x = 716.20

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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.