Home / 979,932,856.80-1,470,186,261.28-289,858,487.36

Finding the Fourth Proportional to 979,932,856.80, 1,470,186,261.28 and 289,858,487.36

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Solution

The fourth proportional to 979,932,856.80, 1,470,186,261.28 and 289,858,487.36 is: 434,872,616.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,932,856.80 : 1,470,186,261.28 = 289,858,487.36 : x
  2. Step 2: Convert to fraction form
    979,932,856.80/1,470,186,261.28 = 289,858,487.36/x
  3. Step 3: Cross multiply
    979,932,856.80x = 1,470,186,261.28 × 289,858,487.36
  4. Step 4: Simplify right side
    979,932,856.80x = 426,145,965,832,074,560
  5. Step 5: Solve for x
    x = 426,145,965,832,074,560/979,932,856.80
  6. Step 6: Final answer
    x = 434,872,616.91

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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.