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Finding the Fourth Proportional to 354,291.78, 531,346.95 and 104,915.46

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Solution

The fourth proportional to 354,291.78, 531,346.95 and 104,915.46 is: 157,346.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,291.78 : 531,346.95 = 104,915.46 : x
  2. Step 2: Convert to fraction form
    354,291.78/531,346.95 = 104,915.46/x
  3. Step 3: Cross multiply
    354,291.78x = 531,346.95 × 104,915.46
  4. Step 4: Simplify right side
    354,291.78x = 55,746,509,678.85
  5. Step 5: Solve for x
    x = 55,746,509,678.85/354,291.78
  6. Step 6: Final answer
    x = 157,346.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.