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Finding the Fourth Proportional to 668,761,003.40, 922,920,767.70 and 371,404,586.12

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Solution

The fourth proportional to 668,761,003.40, 922,920,767.70 and 371,404,586.12 is: 512,555,313.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,761,003.40 : 922,920,767.70 = 371,404,586.12 : x
  2. Step 2: Convert to fraction form
    668,761,003.40/922,920,767.70 = 371,404,586.12/x
  3. Step 3: Cross multiply
    668,761,003.40x = 922,920,767.70 × 371,404,586.12
  4. Step 4: Simplify right side
    668,761,003.40x = 342,777,005,749,171,200
  5. Step 5: Solve for x
    x = 342,777,005,749,171,200/668,761,003.40
  6. Step 6: Final answer
    x = 512,555,313.49

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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.