Home / 786,407,352.80-1,180,366,856.40-398,667,999.20

Finding the Fourth Proportional to 786,407,352.80, 1,180,366,856.40 and 398,667,999.20

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Solution

The fourth proportional to 786,407,352.80, 1,180,366,856.40 and 398,667,999.20 is: 598,385,164.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    786,407,352.80 : 1,180,366,856.40 = 398,667,999.20 : x
  2. Step 2: Convert to fraction form
    786,407,352.80/1,180,366,856.40 = 398,667,999.20/x
  3. Step 3: Cross multiply
    786,407,352.80x = 1,180,366,856.40 × 398,667,999.20
  4. Step 4: Simplify right side
    786,407,352.80x = 470,574,492,962,981,760
  5. Step 5: Solve for x
    x = 470,574,492,962,981,760/786,407,352.80
  6. Step 6: Final answer
    x = 598,385,164.24

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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.