Home / 686,287.28-947,076.50-380,383.29

Finding the Fourth Proportional to 686,287.28, 947,076.50 and 380,383.29

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Solution

The fourth proportional to 686,287.28, 947,076.50 and 380,383.29 is: 524,928.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,287.28 : 947,076.50 = 380,383.29 : x
  2. Step 2: Convert to fraction form
    686,287.28/947,076.50 = 380,383.29/x
  3. Step 3: Cross multiply
    686,287.28x = 947,076.50 × 380,383.29
  4. Step 4: Simplify right side
    686,287.28x = 360,252,075,902.64
  5. Step 5: Solve for x
    x = 360,252,075,902.64/686,287.28
  6. Step 6: Final answer
    x = 524,928.97

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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.