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Finding the Fourth Proportional to 315,136.40, 434,877.48 and 187,809.68

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Solution

The fourth proportional to 315,136.40, 434,877.48 and 187,809.68 is: 259,170.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,136.40 : 434,877.48 = 187,809.68 : x
  2. Step 2: Convert to fraction form
    315,136.40/434,877.48 = 187,809.68/x
  3. Step 3: Cross multiply
    315,136.40x = 434,877.48 × 187,809.68
  4. Step 4: Simplify right side
    315,136.40x = 81,674,200,358.01
  5. Step 5: Solve for x
    x = 81,674,200,358.01/315,136.40
  6. Step 6: Final answer
    x = 259,170.95

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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.