Home / 656,419.87-905,670.46-427,314.34

Finding the Fourth Proportional to 656,419.87, 905,670.46 and 427,314.34

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Solution

The fourth proportional to 656,419.87, 905,670.46 and 427,314.34 is: 589,570.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,419.87 : 905,670.46 = 427,314.34 : x
  2. Step 2: Convert to fraction form
    656,419.87/905,670.46 = 427,314.34/x
  3. Step 3: Cross multiply
    656,419.87x = 905,670.46 × 427,314.34
  4. Step 4: Simplify right side
    656,419.87x = 387,005,974,872.40
  5. Step 5: Solve for x
    x = 387,005,974,872.40/656,419.87
  6. Step 6: Final answer
    x = 589,570.78

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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.