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Finding the Fourth Proportional to 822,679.54, 1,135,381.53 and 500,411.86

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Solution

The fourth proportional to 822,679.54, 1,135,381.53 and 500,411.86 is: 690,619.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    822,679.54 : 1,135,381.53 = 500,411.86 : x
  2. Step 2: Convert to fraction form
    822,679.54/1,135,381.53 = 500,411.86/x
  3. Step 3: Cross multiply
    822,679.54x = 1,135,381.53 × 500,411.86
  4. Step 4: Simplify right side
    822,679.54x = 568,158,383,236.95
  5. Step 5: Solve for x
    x = 568,158,383,236.95/822,679.54
  6. Step 6: Final answer
    x = 690,619.32

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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.