Home / 678,885.42-1,017,937.89-279,801.66

Finding the Fourth Proportional to 678,885.42, 1,017,937.89 and 279,801.66

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Solution

The fourth proportional to 678,885.42, 1,017,937.89 and 279,801.66 is: 419,541.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,885.42 : 1,017,937.89 = 279,801.66 : x
  2. Step 2: Convert to fraction form
    678,885.42/1,017,937.89 = 279,801.66/x
  3. Step 3: Cross multiply
    678,885.42x = 1,017,937.89 × 279,801.66
  4. Step 4: Simplify right side
    678,885.42x = 284,820,711,398.90
  5. Step 5: Solve for x
    x = 284,820,711,398.90/678,885.42
  6. Step 6: Final answer
    x = 419,541.65

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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.