Home / 690,503,444.78-1,036,409,985.18-427,392,106.83

Finding the Fourth Proportional to 690,503,444.78, 1,036,409,985.18 and 427,392,106.83

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Solution

The fourth proportional to 690,503,444.78, 1,036,409,985.18 and 427,392,106.83 is: 641,493,464.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,503,444.78 : 1,036,409,985.18 = 427,392,106.83 : x
  2. Step 2: Convert to fraction form
    690,503,444.78/1,036,409,985.18 = 427,392,106.83/x
  3. Step 3: Cross multiply
    690,503,444.78x = 1,036,409,985.18 × 427,392,106.83
  4. Step 4: Simplify right side
    690,503,444.78x = 442,953,447,105,729,216
  5. Step 5: Solve for x
    x = 442,953,447,105,729,216/690,503,444.78
  6. Step 6: Final answer
    x = 641,493,464.60

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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.