Home / 715,583.90-987,523.89-393,302.18

Finding the Fourth Proportional to 715,583.90, 987,523.89 and 393,302.18

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Solution

The fourth proportional to 715,583.90, 987,523.89 and 393,302.18 is: 542,766.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,583.90 : 987,523.89 = 393,302.18 : x
  2. Step 2: Convert to fraction form
    715,583.90/987,523.89 = 393,302.18/x
  3. Step 3: Cross multiply
    715,583.90x = 987,523.89 × 393,302.18
  4. Step 4: Simplify right side
    715,583.90x = 388,395,298,739.08
  5. Step 5: Solve for x
    x = 388,395,298,739.08/715,583.90
  6. Step 6: Final answer
    x = 542,766.96

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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.