Home / 1,019.28-1,406.63-577.09

Finding the Fourth Proportional to 1,019.28, 1,406.63 and 577.09

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Solution

The fourth proportional to 1,019.28, 1,406.63 and 577.09 is: 796.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019.28 : 1,406.63 = 577.09 : x
  2. Step 2: Convert to fraction form
    1,019.28/1,406.63 = 577.09/x
  3. Step 3: Cross multiply
    1,019.28x = 1,406.63 × 577.09
  4. Step 4: Simplify right side
    1,019.28x = 811,752.11
  5. Step 5: Solve for x
    x = 811,752.11/1,019.28
  6. Step 6: Final answer
    x = 796.40

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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.