Home / 715,834.35-987,842.54-393,541.62

Finding the Fourth Proportional to 715,834.35, 987,842.54 and 393,541.62

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Solution

The fourth proportional to 715,834.35, 987,842.54 and 393,541.62 is: 543,082.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,834.35 : 987,842.54 = 393,541.62 : x
  2. Step 2: Convert to fraction form
    715,834.35/987,842.54 = 393,541.62/x
  3. Step 3: Cross multiply
    715,834.35x = 987,842.54 × 393,541.62
  4. Step 4: Simplify right side
    715,834.35x = 388,757,151,528.81
  5. Step 5: Solve for x
    x = 388,757,151,528.81/715,834.35
  6. Step 6: Final answer
    x = 543,082.56

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Double scale
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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.