Home / 393,416,905.21-542,962,938.04-223,912,357.79

Finding the Fourth Proportional to 393,416,905.21, 542,962,938.04 and 223,912,357.79

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Solution

The fourth proportional to 393,416,905.21, 542,962,938.04 and 223,912,357.79 is: 309,026,150.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,416,905.21 : 542,962,938.04 = 223,912,357.79 : x
  2. Step 2: Convert to fraction form
    393,416,905.21/542,962,938.04 = 223,912,357.79/x
  3. Step 3: Cross multiply
    393,416,905.21x = 542,962,938.04 × 223,912,357.79
  4. Step 4: Simplify right side
    393,416,905.21x = 121,576,111,649,122,064
  5. Step 5: Solve for x
    x = 121,576,111,649,122,064/393,416,905.21
  6. Step 6: Final answer
    x = 309,026,150.22

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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.