Home / 686,148.28-946,890.20-380,229.81

Finding the Fourth Proportional to 686,148.28, 946,890.20 and 380,229.81

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Solution

The fourth proportional to 686,148.28, 946,890.20 and 380,229.81 is: 524,720.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,148.28 : 946,890.20 = 380,229.81 : x
  2. Step 2: Convert to fraction form
    686,148.28/946,890.20 = 380,229.81/x
  3. Step 3: Cross multiply
    686,148.28x = 946,890.20 × 380,229.81
  4. Step 4: Simplify right side
    686,148.28x = 360,035,878,236.60
  5. Step 5: Solve for x
    x = 360,035,878,236.60/686,148.28
  6. Step 6: Final answer
    x = 524,720.22

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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.