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Finding the Fourth Proportional to 308,895.40, 426,270.21 and 171,071.47

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Solution

The fourth proportional to 308,895.40, 426,270.21 and 171,071.47 is: 236,075.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,895.40 : 426,270.21 = 171,071.47 : x
  2. Step 2: Convert to fraction form
    308,895.40/426,270.21 = 171,071.47/x
  3. Step 3: Cross multiply
    308,895.40x = 426,270.21 × 171,071.47
  4. Step 4: Simplify right side
    308,895.40x = 72,922,671,441.91
  5. Step 5: Solve for x
    x = 72,922,671,441.91/308,895.40
  6. Step 6: Final answer
    x = 236,075.61

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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.