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Finding the Fourth Proportional to 520,072.70, 778,381.05 and 377,512.70

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Solution

The fourth proportional to 520,072.70, 778,381.05 and 377,512.70 is: 565,014.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,072.70 : 778,381.05 = 377,512.70 : x
  2. Step 2: Convert to fraction form
    520,072.70/778,381.05 = 377,512.70/x
  3. Step 3: Cross multiply
    520,072.70x = 778,381.05 × 377,512.70
  4. Step 4: Simplify right side
    520,072.70x = 293,848,731,814.34
  5. Step 5: Solve for x
    x = 293,848,731,814.34/520,072.70
  6. Step 6: Final answer
    x = 565,014.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.