Home / 686,285.28-947,131.20-380,436.48

Finding the Fourth Proportional to 686,285.28, 947,131.20 and 380,436.48

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Solution

The fourth proportional to 686,285.28, 947,131.20 and 380,436.48 is: 525,034.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,285.28 : 947,131.20 = 380,436.48 : x
  2. Step 2: Convert to fraction form
    686,285.28/947,131.20 = 380,436.48/x
  3. Step 3: Cross multiply
    686,285.28x = 947,131.20 × 380,436.48
  4. Step 4: Simplify right side
    686,285.28x = 360,323,259,826.18
  5. Step 5: Solve for x
    x = 360,323,259,826.18/686,285.28
  6. Step 6: Final answer
    x = 525,034.22

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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.