Home / 665,355.10-918,190.85-359,431.47

Finding the Fourth Proportional to 665,355.10, 918,190.85 and 359,431.47

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Solution

The fourth proportional to 665,355.10, 918,190.85 and 359,431.47 is: 496,015.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,355.10 : 918,190.85 = 359,431.47 : x
  2. Step 2: Convert to fraction form
    665,355.10/918,190.85 = 359,431.47/x
  3. Step 3: Cross multiply
    665,355.10x = 918,190.85 × 359,431.47
  4. Step 4: Simplify right side
    665,355.10x = 330,026,686,956.05
  5. Step 5: Solve for x
    x = 330,026,686,956.05/665,355.10
  6. Step 6: Final answer
    x = 496,015.87

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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.