Home / 1,089,172,679.30-1,503,013,900.52-643,280,394.28

Finding the Fourth Proportional to 1,089,172,679.30, 1,503,013,900.52 and 643,280,394.28

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Solution

The fourth proportional to 1,089,172,679.30, 1,503,013,900.52 and 643,280,394.28 is: 887,700,722.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089,172,679.30 : 1,503,013,900.52 = 643,280,394.28 : x
  2. Step 2: Convert to fraction form
    1,089,172,679.30/1,503,013,900.52 = 643,280,394.28/x
  3. Step 3: Cross multiply
    1,089,172,679.30x = 1,503,013,900.52 × 643,280,394.28
  4. Step 4: Simplify right side
    1,089,172,679.30x = 966,859,374,524,094,848
  5. Step 5: Solve for x
    x = 966,859,374,524,094,848/1,089,172,679.30
  6. Step 6: Final answer
    x = 887,700,722.67

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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.