Home / 1,127.07-1,690.68-305.28

Finding the Fourth Proportional to 1,127.07, 1,690.68 and 305.28

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Solution

The fourth proportional to 1,127.07, 1,690.68 and 305.28 is: 457.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.07 : 1,690.68 = 305.28 : x
  2. Step 2: Convert to fraction form
    1,127.07/1,690.68 = 305.28/x
  3. Step 3: Cross multiply
    1,127.07x = 1,690.68 × 305.28
  4. Step 4: Simplify right side
    1,127.07x = 516,130.79
  5. Step 5: Solve for x
    x = 516,130.79/1,127.07
  6. Step 6: Final answer
    x = 457.94

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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.