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Finding the Fourth Proportional to 735.43, 1,014.77 and 420.64

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Solution

The fourth proportional to 735.43, 1,014.77 and 420.64 is: 580.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    735.43 : 1,014.77 = 420.64 : x
  2. Step 2: Convert to fraction form
    735.43/1,014.77 = 420.64/x
  3. Step 3: Cross multiply
    735.43x = 1,014.77 × 420.64
  4. Step 4: Simplify right side
    735.43x = 426,851.80
  5. Step 5: Solve for x
    x = 426,851.80/735.43
  6. Step 6: Final answer
    x = 580.41

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1.5x scale

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.