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Finding the Fourth Proportional to 686,694.52, 947,621.46 and 380,772.10

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Solution

The fourth proportional to 686,694.52, 947,621.46 and 380,772.10 is: 525,456.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,694.52 : 947,621.46 = 380,772.10 : x
  2. Step 2: Convert to fraction form
    686,694.52/947,621.46 = 380,772.10/x
  3. Step 3: Cross multiply
    686,694.52x = 947,621.46 × 380,772.10
  4. Step 4: Simplify right side
    686,694.52x = 360,827,813,329.27
  5. Step 5: Solve for x
    x = 360,827,813,329.27/686,694.52
  6. Step 6: Final answer
    x = 525,456.08

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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.