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Finding the Fourth Proportional to 686,616.56, 947,478.60 and 384,752.24

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Solution

The fourth proportional to 686,616.56, 947,478.60 and 384,752.24 is: 530,928.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,616.56 : 947,478.60 = 384,752.24 : x
  2. Step 2: Convert to fraction form
    686,616.56/947,478.60 = 384,752.24/x
  3. Step 3: Cross multiply
    686,616.56x = 947,478.60 × 384,752.24
  4. Step 4: Simplify right side
    686,616.56x = 364,544,513,702.06
  5. Step 5: Solve for x
    x = 364,544,513,702.06/686,616.56
  6. Step 6: Final answer
    x = 530,928.81

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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.