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Finding the Fourth Proportional to 1,014.94, 1,521.96 and 429.85

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Solution

The fourth proportional to 1,014.94, 1,521.96 and 429.85 is: 644.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,014.94 : 1,521.96 = 429.85 : x
  2. Step 2: Convert to fraction form
    1,014.94/1,521.96 = 429.85/x
  3. Step 3: Cross multiply
    1,014.94x = 1,521.96 × 429.85
  4. Step 4: Simplify right side
    1,014.94x = 654,214.51
  5. Step 5: Solve for x
    x = 654,214.51/1,014.94
  6. Step 6: Final answer
    x = 644.58

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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.