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Finding the Fourth Proportional to 715,654.04, 987,580.55 and 393,363.14

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Solution

The fourth proportional to 715,654.04, 987,580.55 and 393,363.14 is: 542,829.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,654.04 : 987,580.55 = 393,363.14 : x
  2. Step 2: Convert to fraction form
    715,654.04/987,580.55 = 393,363.14/x
  3. Step 3: Cross multiply
    715,654.04x = 987,580.55 × 393,363.14
  4. Step 4: Simplify right side
    715,654.04x = 388,477,782,196.43
  5. Step 5: Solve for x
    x = 388,477,782,196.43/715,654.04
  6. Step 6: Final answer
    x = 542,829.03

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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.