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Finding the Fourth Proportional to 994,556,978.40, 1,488,965,686.20 and 879,765,722.40

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Solution

The fourth proportional to 994,556,978.40, 1,488,965,686.20 and 879,765,722.40 is: 1,317,110,030.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    994,556,978.40 : 1,488,965,686.20 = 879,765,722.40 : x
  2. Step 2: Convert to fraction form
    994,556,978.40/1,488,965,686.20 = 879,765,722.40/x
  3. Step 3: Cross multiply
    994,556,978.40x = 1,488,965,686.20 × 879,765,722.40
  4. Step 4: Simplify right side
    994,556,978.40x = 1,309,940,972,548,554,752
  5. Step 5: Solve for x
    x = 1,309,940,972,548,554,752/994,556,978.40
  6. Step 6: Final answer
    x = 1,317,110,030.90

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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.