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Finding the Fourth Proportional to 308,409.66, 425,441.16 and 187,587.90

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Solution

The fourth proportional to 308,409.66, 425,441.16 and 187,587.90 is: 258,771.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,409.66 : 425,441.16 = 187,587.90 : x
  2. Step 2: Convert to fraction form
    308,409.66/425,441.16 = 187,587.90/x
  3. Step 3: Cross multiply
    308,409.66x = 425,441.16 × 187,587.90
  4. Step 4: Simplify right side
    308,409.66x = 79,807,613,777.96
  5. Step 5: Solve for x
    x = 79,807,613,777.96/308,409.66
  6. Step 6: Final answer
    x = 258,771.45

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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.