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Finding the Fourth Proportional to 641,970.82, 885,919.71 and 355,491.10

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Solution

The fourth proportional to 641,970.82, 885,919.71 and 355,491.10 is: 490,577.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,970.82 : 885,919.71 = 355,491.10 : x
  2. Step 2: Convert to fraction form
    641,970.82/885,919.71 = 355,491.10/x
  3. Step 3: Cross multiply
    641,970.82x = 885,919.71 × 355,491.10
  4. Step 4: Simplify right side
    641,970.82x = 314,936,572,219.58
  5. Step 5: Solve for x
    x = 314,936,572,219.58/641,970.82
  6. Step 6: Final answer
    x = 490,577.71

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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.