Home / 705,939.12-974,118.42-399,992.40

Finding the Fourth Proportional to 705,939.12, 974,118.42 and 399,992.40

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Solution

The fourth proportional to 705,939.12, 974,118.42 and 399,992.40 is: 551,945.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,939.12 : 974,118.42 = 399,992.40 : x
  2. Step 2: Convert to fraction form
    705,939.12/974,118.42 = 399,992.40/x
  3. Step 3: Cross multiply
    705,939.12x = 974,118.42 × 399,992.40
  4. Step 4: Simplify right side
    705,939.12x = 389,639,964,700.01
  5. Step 5: Solve for x
    x = 389,639,964,700.01/705,939.12
  6. Step 6: Final answer
    x = 551,945.56

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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.