Home / 1,119,957,756.78-1,545,310,972.83-643,556,074.53

Finding the Fourth Proportional to 1,119,957,756.78, 1,545,310,972.83 and 643,556,074.53

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Solution

The fourth proportional to 1,119,957,756.78, 1,545,310,972.83 and 643,556,074.53 is: 887,974,798.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119,957,756.78 : 1,545,310,972.83 = 643,556,074.53 : x
  2. Step 2: Convert to fraction form
    1,119,957,756.78/1,545,310,972.83 = 643,556,074.53/x
  3. Step 3: Cross multiply
    1,119,957,756.78x = 1,545,310,972.83 × 643,556,074.53
  4. Step 4: Simplify right side
    1,119,957,756.78x = 994,494,263,602,610,176
  5. Step 5: Solve for x
    x = 994,494,263,602,610,176/1,119,957,756.78
  6. Step 6: Final answer
    x = 887,974,798.68

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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.