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Finding the Fourth Proportional to 703.32, 1,055.52 and 459.78

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Solution

The fourth proportional to 703.32, 1,055.52 and 459.78 is: 690.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    703.32 : 1,055.52 = 459.78 : x
  2. Step 2: Convert to fraction form
    703.32/1,055.52 = 459.78/x
  3. Step 3: Cross multiply
    703.32x = 1,055.52 × 459.78
  4. Step 4: Simplify right side
    703.32x = 485,306.99
  5. Step 5: Solve for x
    x = 485,306.99/703.32
  6. Step 6: Final answer
    x = 690.02

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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.