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Finding the Fourth Proportional to 641,964, 885,899.41 and 355,477.93

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Solution

The fourth proportional to 641,964, 885,899.41 and 355,477.93 is: 490,553.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,964 : 885,899.41 = 355,477.93 : x
  2. Step 2: Convert to fraction form
    641,964/885,899.41 = 355,477.93/x
  3. Step 3: Cross multiply
    641,964x = 885,899.41 × 355,477.93
  4. Step 4: Simplify right side
    641,964x = 314,917,688,455.02
  5. Step 5: Solve for x
    x = 314,917,688,455.02/641,964
  6. Step 6: Final answer
    x = 490,553.50

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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.