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Finding the Fourth Proportional to 611,061.60, 843,366.43 and 356,412.79

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Solution

The fourth proportional to 611,061.60, 843,366.43 and 356,412.79 is: 491,908.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,061.60 : 843,366.43 = 356,412.79 : x
  2. Step 2: Convert to fraction form
    611,061.60/843,366.43 = 356,412.79/x
  3. Step 3: Cross multiply
    611,061.60x = 843,366.43 × 356,412.79
  4. Step 4: Simplify right side
    611,061.60x = 300,586,583,808.36
  5. Step 5: Solve for x
    x = 300,586,583,808.36/611,061.60
  6. Step 6: Final answer
    x = 491,908.81

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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.