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Finding the Fourth Proportional to 315,256.50, 434,994.45 and 187,943.94

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Solution

The fourth proportional to 315,256.50, 434,994.45 and 187,943.94 is: 259,327.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,256.50 : 434,994.45 = 187,943.94 : x
  2. Step 2: Convert to fraction form
    315,256.50/434,994.45 = 187,943.94/x
  3. Step 3: Cross multiply
    315,256.50x = 434,994.45 × 187,943.94
  4. Step 4: Simplify right side
    315,256.50x = 81,754,570,811.13
  5. Step 5: Solve for x
    x = 81,754,570,811.13/315,256.50
  6. Step 6: Final answer
    x = 259,327.15

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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.