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Finding the Fourth Proportional to 519,887.70, 779,831.55 and 499,220.55

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Solution

The fourth proportional to 519,887.70, 779,831.55 and 499,220.55 is: 748,830.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,887.70 : 779,831.55 = 499,220.55 : x
  2. Step 2: Convert to fraction form
    519,887.70/779,831.55 = 499,220.55/x
  3. Step 3: Cross multiply
    519,887.70x = 779,831.55 × 499,220.55
  4. Step 4: Simplify right side
    519,887.70x = 389,307,935,298.35
  5. Step 5: Solve for x
    x = 389,307,935,298.35/519,887.70
  6. Step 6: Final answer
    x = 748,830.83

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.