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Finding the Fourth Proportional to 290,075.36, 435,243.60 and 156,799.60

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Solution

The fourth proportional to 290,075.36, 435,243.60 and 156,799.60 is: 235,269.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,075.36 : 435,243.60 = 156,799.60 : x
  2. Step 2: Convert to fraction form
    290,075.36/435,243.60 = 156,799.60/x
  3. Step 3: Cross multiply
    290,075.36x = 435,243.60 × 156,799.60
  4. Step 4: Simplify right side
    290,075.36x = 68,246,022,382.56
  5. Step 5: Solve for x
    x = 68,246,022,382.56/290,075.36
  6. Step 6: Final answer
    x = 235,269.97

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1.5x scale

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.