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Finding the Fourth Proportional to 734.86, 1,014.36 and 455.30

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Solution

The fourth proportional to 734.86, 1,014.36 and 455.30 is: 628.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.86 : 1,014.36 = 455.30 : x
  2. Step 2: Convert to fraction form
    734.86/1,014.36 = 455.30/x
  3. Step 3: Cross multiply
    734.86x = 1,014.36 × 455.30
  4. Step 4: Simplify right side
    734.86x = 461,838.11
  5. Step 5: Solve for x
    x = 461,838.11/734.86
  6. Step 6: Final answer
    x = 628.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.