Home / 1,398,471,015.86-1,929,889,710.90-771,939,277.76

Finding the Fourth Proportional to 1,398,471,015.86, 1,929,889,710.90 and 771,939,277.76

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Solution

The fourth proportional to 1,398,471,015.86, 1,929,889,710.90 and 771,939,277.76 is: 1,065,276,042.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,471,015.86 : 1,929,889,710.90 = 771,939,277.76 : x
  2. Step 2: Convert to fraction form
    1,398,471,015.86/1,929,889,710.90 = 771,939,277.76/x
  3. Step 3: Cross multiply
    1,398,471,015.86x = 1,929,889,710.90 × 771,939,277.76
  4. Step 4: Simplify right side
    1,398,471,015.86x = 1,489,757,669,588,601,344
  5. Step 5: Solve for x
    x = 1,489,757,669,588,601,344/1,398,471,015.86
  6. Step 6: Final answer
    x = 1,065,276,042.69

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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.