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Finding the Fourth Proportional to 516,143.70, 774,215.55 and 398,045.70

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Solution

The fourth proportional to 516,143.70, 774,215.55 and 398,045.70 is: 597,068.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,143.70 : 774,215.55 = 398,045.70 : x
  2. Step 2: Convert to fraction form
    516,143.70/774,215.55 = 398,045.70/x
  3. Step 3: Cross multiply
    516,143.70x = 774,215.55 × 398,045.70
  4. Step 4: Simplify right side
    516,143.70x = 308,173,170,550.64
  5. Step 5: Solve for x
    x = 308,173,170,550.64/516,143.70
  6. Step 6: Final answer
    x = 597,068.55

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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.