Home / 690,503,445.53-1,036,409,986.31-427,392,107.58

Finding the Fourth Proportional to 690,503,445.53, 1,036,409,986.31 and 427,392,107.58

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Solution

The fourth proportional to 690,503,445.53, 1,036,409,986.31 and 427,392,107.58 is: 641,493,465.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,503,445.53 : 1,036,409,986.31 = 427,392,107.58 : x
  2. Step 2: Convert to fraction form
    690,503,445.53/1,036,409,986.31 = 427,392,107.58/x
  3. Step 3: Cross multiply
    690,503,445.53x = 1,036,409,986.31 × 427,392,107.58
  4. Step 4: Simplify right side
    690,503,445.53x = 442,953,448,363,852,864
  5. Step 5: Solve for x
    x = 442,953,448,363,852,864/690,503,445.53
  6. Step 6: Final answer
    x = 641,493,465.72

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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.