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Finding the Fourth Proportional to 517,153.85, 775,730.78 and 357,721.55

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Solution

The fourth proportional to 517,153.85, 775,730.78 and 357,721.55 is: 536,582.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,153.85 : 775,730.78 = 357,721.55 : x
  2. Step 2: Convert to fraction form
    517,153.85/775,730.78 = 357,721.55/x
  3. Step 3: Cross multiply
    517,153.85x = 775,730.78 × 357,721.55
  4. Step 4: Simplify right side
    517,153.85x = 277,495,615,215.70
  5. Step 5: Solve for x
    x = 277,495,615,215.70/517,153.85
  6. Step 6: Final answer
    x = 536,582.33

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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.