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Finding the Fourth Proportional to 286,183,684.80, 394,933,478.40 and 155,803,492.80

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Solution

The fourth proportional to 286,183,684.80, 394,933,478.40 and 155,803,492.80 is: 215,008,816.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,183,684.80 : 394,933,478.40 = 155,803,492.80 : x
  2. Step 2: Convert to fraction form
    286,183,684.80/394,933,478.40 = 155,803,492.80/x
  3. Step 3: Cross multiply
    286,183,684.80x = 394,933,478.40 × 155,803,492.80
  4. Step 4: Simplify right side
    286,183,684.80x = 61,532,015,358,373,360
  5. Step 5: Solve for x
    x = 61,532,015,358,373,360/286,183,684.80
  6. Step 6: Final answer
    x = 215,008,816.46

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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.