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Finding the Fourth Proportional to 651,956.20, 978,371.70 and 385,433.80

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Solution

The fourth proportional to 651,956.20, 978,371.70 and 385,433.80 is: 578,409.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,956.20 : 978,371.70 = 385,433.80 : x
  2. Step 2: Convert to fraction form
    651,956.20/978,371.70 = 385,433.80/x
  3. Step 3: Cross multiply
    651,956.20x = 978,371.70 × 385,433.80
  4. Step 4: Simplify right side
    651,956.20x = 377,097,522,143.46
  5. Step 5: Solve for x
    x = 377,097,522,143.46/651,956.20
  6. Step 6: Final answer
    x = 578,409.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.