Home / 1,079.77-1,619.65-430.51

Finding the Fourth Proportional to 1,079.77, 1,619.65 and 430.51

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Solution

The fourth proportional to 1,079.77, 1,619.65 and 430.51 is: 645.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.77 : 1,619.65 = 430.51 : x
  2. Step 2: Convert to fraction form
    1,079.77/1,619.65 = 430.51/x
  3. Step 3: Cross multiply
    1,079.77x = 1,619.65 × 430.51
  4. Step 4: Simplify right side
    1,079.77x = 697,272.01
  5. Step 5: Solve for x
    x = 697,272.01/1,079.77
  6. Step 6: Final answer
    x = 645.76

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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.