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Finding the Fourth Proportional to 608,436.60, 913,212.90 and 309,125.40

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Solution

The fourth proportional to 608,436.60, 913,212.90 and 309,125.40 is: 463,971.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,436.60 : 913,212.90 = 309,125.40 : x
  2. Step 2: Convert to fraction form
    608,436.60/913,212.90 = 309,125.40/x
  3. Step 3: Cross multiply
    608,436.60x = 913,212.90 × 309,125.40
  4. Step 4: Simplify right side
    608,436.60x = 282,297,302,997.66
  5. Step 5: Solve for x
    x = 282,297,302,997.66/608,436.60
  6. Step 6: Final answer
    x = 463,971.60

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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.