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Finding the Fourth Proportional to 753.22, 1,130.16 and 406.15

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Solution

The fourth proportional to 753.22, 1,130.16 and 406.15 is: 609.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.22 : 1,130.16 = 406.15 : x
  2. Step 2: Convert to fraction form
    753.22/1,130.16 = 406.15/x
  3. Step 3: Cross multiply
    753.22x = 1,130.16 × 406.15
  4. Step 4: Simplify right side
    753.22x = 459,014.48
  5. Step 5: Solve for x
    x = 459,014.48/753.22
  6. Step 6: Final answer
    x = 609.40

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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.