Home / 1,079.55-1,619.54-430.35

Finding the Fourth Proportional to 1,079.55, 1,619.54 and 430.35

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Solution

The fourth proportional to 1,079.55, 1,619.54 and 430.35 is: 645.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.55 : 1,619.54 = 430.35 : x
  2. Step 2: Convert to fraction form
    1,079.55/1,619.54 = 430.35/x
  3. Step 3: Cross multiply
    1,079.55x = 1,619.54 × 430.35
  4. Step 4: Simplify right side
    1,079.55x = 696,966.89
  5. Step 5: Solve for x
    x = 696,966.89/1,079.55
  6. Step 6: Final answer
    x = 645.61

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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.