Home / 686,629.80-947,359.05-396,221.16

Finding the Fourth Proportional to 686,629.80, 947,359.05 and 396,221.16

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Solution

The fourth proportional to 686,629.80, 947,359.05 and 396,221.16 is: 546,675.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,629.80 : 947,359.05 = 396,221.16 : x
  2. Step 2: Convert to fraction form
    686,629.80/947,359.05 = 396,221.16/x
  3. Step 3: Cross multiply
    686,629.80x = 947,359.05 × 396,221.16
  4. Step 4: Simplify right side
    686,629.80x = 375,363,701,727.50
  5. Step 5: Solve for x
    x = 375,363,701,727.50/686,629.80
  6. Step 6: Final answer
    x = 546,675.52

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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.