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Finding the Fourth Proportional to 519,658.18, 717,816.80 and 418,066.28

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Solution

The fourth proportional to 519,658.18, 717,816.80 and 418,066.28 is: 577,485.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,658.18 : 717,816.80 = 418,066.28 : x
  2. Step 2: Convert to fraction form
    519,658.18/717,816.80 = 418,066.28/x
  3. Step 3: Cross multiply
    519,658.18x = 717,816.80 × 418,066.28
  4. Step 4: Simplify right side
    519,658.18x = 300,094,999,297.50
  5. Step 5: Solve for x
    x = 300,094,999,297.50/519,658.18
  6. Step 6: Final answer
    x = 577,485.38

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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.