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Finding the Fourth Proportional to 663,529.44, 915,381.60 and 421,682.40

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Solution

The fourth proportional to 663,529.44, 915,381.60 and 421,682.40 is: 581,738.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,529.44 : 915,381.60 = 421,682.40 : x
  2. Step 2: Convert to fraction form
    663,529.44/915,381.60 = 421,682.40/x
  3. Step 3: Cross multiply
    663,529.44x = 915,381.60 × 421,682.40
  4. Step 4: Simplify right side
    663,529.44x = 386,000,310,003.84
  5. Step 5: Solve for x
    x = 386,000,310,003.84/663,529.44
  6. Step 6: Final answer
    x = 581,738.03

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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.