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Finding the Fourth Proportional to 358,681.70, 538,055.55 and 92,443.20

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Solution

The fourth proportional to 358,681.70, 538,055.55 and 92,443.20 is: 138,673.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,681.70 : 538,055.55 = 92,443.20 : x
  2. Step 2: Convert to fraction form
    358,681.70/538,055.55 = 92,443.20/x
  3. Step 3: Cross multiply
    358,681.70x = 538,055.55 × 92,443.20
  4. Step 4: Simplify right side
    358,681.70x = 49,739,576,819.76
  5. Step 5: Solve for x
    x = 49,739,576,819.76/358,681.70
  6. Step 6: Final answer
    x = 138,673.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.