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Finding the Fourth Proportional to 384,874.80, 578,003.40 and 279,812.40

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Solution

The fourth proportional to 384,874.80, 578,003.40 and 279,812.40 is: 420,221.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,874.80 : 578,003.40 = 279,812.40 : x
  2. Step 2: Convert to fraction form
    384,874.80/578,003.40 = 279,812.40/x
  3. Step 3: Cross multiply
    384,874.80x = 578,003.40 × 279,812.40
  4. Step 4: Simplify right side
    384,874.80x = 161,732,518,562.16
  5. Step 5: Solve for x
    x = 161,732,518,562.16/384,874.80
  6. Step 6: Final answer
    x = 420,221.12

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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.