Home / 385,155,840.19-531,470,218.99-215,619,361.49

Finding the Fourth Proportional to 385,155,840.19, 531,470,218.99 and 215,619,361.49

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Solution

The fourth proportional to 385,155,840.19, 531,470,218.99 and 215,619,361.49 is: 297,529,616.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,155,840.19 : 531,470,218.99 = 215,619,361.49 : x
  2. Step 2: Convert to fraction form
    385,155,840.19/531,470,218.99 = 215,619,361.49/x
  3. Step 3: Cross multiply
    385,155,840.19x = 531,470,218.99 × 215,619,361.49
  4. Step 4: Simplify right side
    385,155,840.19x = 114,595,269,270,363,904
  5. Step 5: Solve for x
    x = 114,595,269,270,363,904/385,155,840.19
  6. Step 6: Final answer
    x = 297,529,616.10

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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.