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Finding the Fourth Proportional to 305,411.22, 421,381.98 and 240,679.80

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Solution

The fourth proportional to 305,411.22, 421,381.98 and 240,679.80 is: 332,070.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,411.22 : 421,381.98 = 240,679.80 : x
  2. Step 2: Convert to fraction form
    305,411.22/421,381.98 = 240,679.80/x
  3. Step 3: Cross multiply
    305,411.22x = 421,381.98 × 240,679.80
  4. Step 4: Simplify right side
    305,411.22x = 101,418,130,670.00
  5. Step 5: Solve for x
    x = 101,418,130,670.00/305,411.22
  6. Step 6: Final answer
    x = 332,070.74

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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.