Home / 391,974,247.19-540,938,735.42-213,349,505.64

Finding the Fourth Proportional to 391,974,247.19, 540,938,735.42 and 213,349,505.64

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Solution

The fourth proportional to 391,974,247.19, 540,938,735.42 and 213,349,505.64 is: 294,430,087.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,974,247.19 : 540,938,735.42 = 213,349,505.64 : x
  2. Step 2: Convert to fraction form
    391,974,247.19/540,938,735.42 = 213,349,505.64/x
  3. Step 3: Cross multiply
    391,974,247.19x = 540,938,735.42 × 213,349,505.64
  4. Step 4: Simplify right side
    391,974,247.19x = 115,409,011,782,405,888
  5. Step 5: Solve for x
    x = 115,409,011,782,405,888/391,974,247.19
  6. Step 6: Final answer
    x = 294,430,087.21

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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.