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Finding the Fourth Proportional to 354,285.28, 488,925.42 and 211,025.80

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Solution

The fourth proportional to 354,285.28, 488,925.42 and 211,025.80 is: 291,222.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,285.28 : 488,925.42 = 211,025.80 : x
  2. Step 2: Convert to fraction form
    354,285.28/488,925.42 = 211,025.80/x
  3. Step 3: Cross multiply
    354,285.28x = 488,925.42 × 211,025.80
  4. Step 4: Simplify right side
    354,285.28x = 103,175,877,895.84
  5. Step 5: Solve for x
    x = 103,175,877,895.84/354,285.28
  6. Step 6: Final answer
    x = 291,222.59

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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.