Home / 290,129.72-435,328.50-132,406.52

Finding the Fourth Proportional to 290,129.72, 435,328.50 and 132,406.52

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Solution

The fourth proportional to 290,129.72, 435,328.50 and 132,406.52 is: 198,670.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,129.72 : 435,328.50 = 132,406.52 : x
  2. Step 2: Convert to fraction form
    290,129.72/435,328.50 = 132,406.52/x
  3. Step 3: Cross multiply
    290,129.72x = 435,328.50 × 132,406.52
  4. Step 4: Simplify right side
    290,129.72x = 57,640,331,741.82
  5. Step 5: Solve for x
    x = 57,640,331,741.82/290,129.72
  6. Step 6: Final answer
    x = 198,670.90

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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.