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Finding the Fourth Proportional to 421,570.89, 581,755.50 and 230,580.18

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Solution

The fourth proportional to 421,570.89, 581,755.50 and 230,580.18 is: 318,193.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,570.89 : 581,755.50 = 230,580.18 : x
  2. Step 2: Convert to fraction form
    421,570.89/581,755.50 = 230,580.18/x
  3. Step 3: Cross multiply
    421,570.89x = 581,755.50 × 230,580.18
  4. Step 4: Simplify right side
    421,570.89x = 134,141,287,905.99
  5. Step 5: Solve for x
    x = 134,141,287,905.99/421,570.89
  6. Step 6: Final answer
    x = 318,193.91

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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.