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Finding the Fourth Proportional to 308,928, 426,670.56 and 208,151.04

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Solution

The fourth proportional to 308,928, 426,670.56 and 208,151.04 is: 287,484.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,928 : 426,670.56 = 208,151.04 : x
  2. Step 2: Convert to fraction form
    308,928/426,670.56 = 208,151.04/x
  3. Step 3: Cross multiply
    308,928x = 426,670.56 × 208,151.04
  4. Step 4: Simplify right side
    308,928x = 88,811,920,801.38
  5. Step 5: Solve for x
    x = 88,811,920,801.38/308,928
  6. Step 6: Final answer
    x = 287,484.21

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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.