Home / 290,669.32-435,999.64-80,302.60

Finding the Fourth Proportional to 290,669.32, 435,999.64 and 80,302.60

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Solution

The fourth proportional to 290,669.32, 435,999.64 and 80,302.60 is: 120,452.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,669.32 : 435,999.64 = 80,302.60 : x
  2. Step 2: Convert to fraction form
    290,669.32/435,999.64 = 80,302.60/x
  3. Step 3: Cross multiply
    290,669.32x = 435,999.64 × 80,302.60
  4. Step 4: Simplify right side
    290,669.32x = 35,011,904,691.06
  5. Step 5: Solve for x
    x = 35,011,904,691.06/290,669.32
  6. Step 6: Final answer
    x = 120,452.70

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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.