Home / 686,983.36-947,969.28-381,054.40

Finding the Fourth Proportional to 686,983.36, 947,969.28 and 381,054.40

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Solution

The fourth proportional to 686,983.36, 947,969.28 and 381,054.40 is: 525,817.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,983.36 : 947,969.28 = 381,054.40 : x
  2. Step 2: Convert to fraction form
    686,983.36/947,969.28 = 381,054.40/x
  3. Step 3: Cross multiply
    686,983.36x = 947,969.28 × 381,054.40
  4. Step 4: Simplify right side
    686,983.36x = 361,227,865,208.83
  5. Step 5: Solve for x
    x = 361,227,865,208.83/686,983.36
  6. Step 6: Final answer
    x = 525,817.49

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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.