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Finding the Fourth Proportional to 421,572.79, 581,755.71 and 240,343.08

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Solution

The fourth proportional to 421,572.79, 581,755.71 and 240,343.08 is: 331,665.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,572.79 : 581,755.71 = 240,343.08 : x
  2. Step 2: Convert to fraction form
    421,572.79/581,755.71 = 240,343.08/x
  3. Step 3: Cross multiply
    421,572.79x = 581,755.71 × 240,343.08
  4. Step 4: Simplify right side
    421,572.79x = 139,820,959,148.99
  5. Step 5: Solve for x
    x = 139,820,959,148.99/421,572.79
  6. Step 6: Final answer
    x = 331,665.05

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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.