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Finding the Fourth Proportional to 740.47, 1,111.03 and 350.75

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Solution

The fourth proportional to 740.47, 1,111.03 and 350.75 is: 526.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.47 : 1,111.03 = 350.75 : x
  2. Step 2: Convert to fraction form
    740.47/1,111.03 = 350.75/x
  3. Step 3: Cross multiply
    740.47x = 1,111.03 × 350.75
  4. Step 4: Simplify right side
    740.47x = 389,692.26
  5. Step 5: Solve for x
    x = 389,692.26/740.47
  6. Step 6: Final answer
    x = 526.28

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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.