Home / 290,445,912.80-435,071,672.40-199,671,999.20

Finding the Fourth Proportional to 290,445,912.80, 435,071,672.40 and 199,671,999.20

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Solution

The fourth proportional to 290,445,912.80, 435,071,672.40 and 199,671,999.20 is: 299,097,445.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,445,912.80 : 435,071,672.40 = 199,671,999.20 : x
  2. Step 2: Convert to fraction form
    290,445,912.80/435,071,672.40 = 199,671,999.20/x
  3. Step 3: Cross multiply
    290,445,912.80x = 435,071,672.40 × 199,671,999.20
  4. Step 4: Simplify right side
    290,445,912.80x = 86,871,630,623,395,456
  5. Step 5: Solve for x
    x = 86,871,630,623,395,456/290,445,912.80
  6. Step 6: Final answer
    x = 299,097,445.67

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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.