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Finding the Fourth Proportional to 611,956,491.32, 918,205,808.34 and 320,754,408.68

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Solution

The fourth proportional to 611,956,491.32, 918,205,808.34 and 320,754,408.68 is: 481,273,693.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,956,491.32 : 918,205,808.34 = 320,754,408.68 : x
  2. Step 2: Convert to fraction form
    611,956,491.32/918,205,808.34 = 320,754,408.68/x
  3. Step 3: Cross multiply
    611,956,491.32x = 918,205,808.34 × 320,754,408.68
  4. Step 4: Simplify right side
    611,956,491.32x = 294,518,561,100,638,144
  5. Step 5: Solve for x
    x = 294,518,561,100,638,144/611,956,491.32
  6. Step 6: Final answer
    x = 481,273,693.93

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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.