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Finding the Fourth Proportional to 715,337.96, 987,226.53 and 393,112.40

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Solution

The fourth proportional to 715,337.96, 987,226.53 and 393,112.40 is: 542,528.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,337.96 : 987,226.53 = 393,112.40 : x
  2. Step 2: Convert to fraction form
    715,337.96/987,226.53 = 393,112.40/x
  3. Step 3: Cross multiply
    715,337.96x = 987,226.53 × 393,112.40
  4. Step 4: Simplify right side
    715,337.96x = 388,090,990,551.97
  5. Step 5: Solve for x
    x = 388,090,990,551.97/715,337.96
  6. Step 6: Final answer
    x = 542,528.16

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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.