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Finding the Fourth Proportional to 1,014.32, 1,520.37 and 429.19

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Solution

The fourth proportional to 1,014.32, 1,520.37 and 429.19 is: 643.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.32 : 1,520.37 = 429.19 : x
  2. Step 2: Convert to fraction form
    1,014.32/1,520.37 = 429.19/x
  3. Step 3: Cross multiply
    1,014.32x = 1,520.37 × 429.19
  4. Step 4: Simplify right side
    1,014.32x = 652,527.60
  5. Step 5: Solve for x
    x = 652,527.60/1,014.32
  6. Step 6: Final answer
    x = 643.32

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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.