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Finding the Fourth Proportional to 421,876.42, 581,583.99 and 300,807.88

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Solution

The fourth proportional to 421,876.42, 581,583.99 and 300,807.88 is: 414,683.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,876.42 : 581,583.99 = 300,807.88 : x
  2. Step 2: Convert to fraction form
    421,876.42/581,583.99 = 300,807.88/x
  3. Step 3: Cross multiply
    421,876.42x = 581,583.99 × 300,807.88
  4. Step 4: Simplify right side
    421,876.42x = 174,945,047,073.84
  5. Step 5: Solve for x
    x = 174,945,047,073.84/421,876.42
  6. Step 6: Final answer
    x = 414,683.16

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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.