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Finding the Fourth Proportional to 734.60, 1,013.78 and 403.05

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Solution

The fourth proportional to 734.60, 1,013.78 and 403.05 is: 556.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.60 : 1,013.78 = 403.05 : x
  2. Step 2: Convert to fraction form
    734.60/1,013.78 = 403.05/x
  3. Step 3: Cross multiply
    734.60x = 1,013.78 × 403.05
  4. Step 4: Simplify right side
    734.60x = 408,602.01
  5. Step 5: Solve for x
    x = 408,602.01/734.60
  6. Step 6: Final answer
    x = 556.22

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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.