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Finding the Fourth Proportional to 290,779.20, 400,917.60 and 236,865.60

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Solution

The fourth proportional to 290,779.20, 400,917.60 and 236,865.60 is: 326,583.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,779.20 : 400,917.60 = 236,865.60 : x
  2. Step 2: Convert to fraction form
    290,779.20/400,917.60 = 236,865.60/x
  3. Step 3: Cross multiply
    290,779.20x = 400,917.60 × 236,865.60
  4. Step 4: Simplify right side
    290,779.20x = 94,963,587,874.56
  5. Step 5: Solve for x
    x = 94,963,587,874.56/290,779.20
  6. Step 6: Final answer
    x = 326,583.15

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1.5x scale

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.