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Finding the Fourth Proportional to 1,015.94, 1,523.46 and 430.85

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Solution

The fourth proportional to 1,015.94, 1,523.46 and 430.85 is: 646.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.94 : 1,523.46 = 430.85 : x
  2. Step 2: Convert to fraction form
    1,015.94/1,523.46 = 430.85/x
  3. Step 3: Cross multiply
    1,015.94x = 1,523.46 × 430.85
  4. Step 4: Simplify right side
    1,015.94x = 656,382.74
  5. Step 5: Solve for x
    x = 656,382.74/1,015.94
  6. Step 6: Final answer
    x = 646.08

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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.