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Finding the Fourth Proportional to 641,602.64, 885,400.92 and 355,116.57

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Solution

The fourth proportional to 641,602.64, 885,400.92 and 355,116.57 is: 490,054.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,602.64 : 885,400.92 = 355,116.57 : x
  2. Step 2: Convert to fraction form
    641,602.64/885,400.92 = 355,116.57/x
  3. Step 3: Cross multiply
    641,602.64x = 885,400.92 × 355,116.57
  4. Step 4: Simplify right side
    641,602.64x = 314,420,537,785.24
  5. Step 5: Solve for x
    x = 314,420,537,785.24/641,602.64
  6. Step 6: Final answer
    x = 490,054.94

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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.