Home / 1,089,172,679.80-1,503,013,901.20-643,280,394.78

Finding the Fourth Proportional to 1,089,172,679.80, 1,503,013,901.20 and 643,280,394.78

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Solution

The fourth proportional to 1,089,172,679.80, 1,503,013,901.20 and 643,280,394.78 is: 887,700,723.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089,172,679.80 : 1,503,013,901.20 = 643,280,394.78 : x
  2. Step 2: Convert to fraction form
    1,089,172,679.80/1,503,013,901.20 = 643,280,394.78/x
  3. Step 3: Cross multiply
    1,089,172,679.80x = 1,503,013,901.20 × 643,280,394.78
  4. Step 4: Simplify right side
    1,089,172,679.80x = 966,859,375,723,763,840
  5. Step 5: Solve for x
    x = 966,859,375,723,763,840/1,089,172,679.80
  6. Step 6: Final answer
    x = 887,700,723.36

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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.