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Finding the Fourth Proportional to 515,454.12, 711,325.98 and 286,048.74

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Solution

The fourth proportional to 515,454.12, 711,325.98 and 286,048.74 is: 394,746.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,454.12 : 711,325.98 = 286,048.74 : x
  2. Step 2: Convert to fraction form
    515,454.12/711,325.98 = 286,048.74/x
  3. Step 3: Cross multiply
    515,454.12x = 711,325.98 × 286,048.74
  4. Step 4: Simplify right side
    515,454.12x = 203,473,900,308.27
  5. Step 5: Solve for x
    x = 203,473,900,308.27/515,454.12
  6. Step 6: Final answer
    x = 394,746.87

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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.