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Finding the Fourth Proportional to 812,718.54, 1,218,018 and 452,874.30

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Solution

The fourth proportional to 812,718.54, 1,218,018 and 452,874.30 is: 678,720.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,718.54 : 1,218,018 = 452,874.30 : x
  2. Step 2: Convert to fraction form
    812,718.54/1,218,018 = 452,874.30/x
  3. Step 3: Cross multiply
    812,718.54x = 1,218,018 × 452,874.30
  4. Step 4: Simplify right side
    812,718.54x = 551,609,049,137.40
  5. Step 5: Solve for x
    x = 551,609,049,137.40/812,718.54
  6. Step 6: Final answer
    x = 678,720.89

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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.