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Finding the Fourth Proportional to 641,967, 885,903.56 and 355,480.94

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Solution

The fourth proportional to 641,967, 885,903.56 and 355,480.94 is: 490,557.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,967 : 885,903.56 = 355,480.94 : x
  2. Step 2: Convert to fraction form
    641,967/885,903.56 = 355,480.94/x
  3. Step 3: Cross multiply
    641,967x = 885,903.56 × 355,480.94
  4. Step 4: Simplify right side
    641,967x = 314,921,830,258.15
  5. Step 5: Solve for x
    x = 314,921,830,258.15/641,967
  6. Step 6: Final answer
    x = 490,557.66

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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.