Home / 686,969.28-947,838.24-396,509.76

Finding the Fourth Proportional to 686,969.28, 947,838.24 and 396,509.76

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Solution

The fourth proportional to 686,969.28, 947,838.24 and 396,509.76 is: 547,079.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,969.28 : 947,838.24 = 396,509.76 : x
  2. Step 2: Convert to fraction form
    686,969.28/947,838.24 = 396,509.76/x
  3. Step 3: Cross multiply
    686,969.28x = 947,838.24 × 396,509.76
  4. Step 4: Simplify right side
    686,969.28x = 375,827,113,061.22
  5. Step 5: Solve for x
    x = 375,827,113,061.22/686,969.28
  6. Step 6: Final answer
    x = 547,079.94

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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.