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Finding the Fourth Proportional to 864.83, 1,296.21 and 498.86

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Solution

The fourth proportional to 864.83, 1,296.21 and 498.86 is: 747.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.83 : 1,296.21 = 498.86 : x
  2. Step 2: Convert to fraction form
    864.83/1,296.21 = 498.86/x
  3. Step 3: Cross multiply
    864.83x = 1,296.21 × 498.86
  4. Step 4: Simplify right side
    864.83x = 646,620.84
  5. Step 5: Solve for x
    x = 646,620.84/864.83
  6. Step 6: Final answer
    x = 747.69

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1.5x scale

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.