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Finding the Fourth Proportional to 290,147.76, 435,267 and 90,427.92

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Solution

The fourth proportional to 290,147.76, 435,267 and 90,427.92 is: 135,656.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,147.76 : 435,267 = 90,427.92 : x
  2. Step 2: Convert to fraction form
    290,147.76/435,267 = 90,427.92/x
  3. Step 3: Cross multiply
    290,147.76x = 435,267 × 90,427.92
  4. Step 4: Simplify right side
    290,147.76x = 39,360,289,454.64
  5. Step 5: Solve for x
    x = 39,360,289,454.64/290,147.76
  6. Step 6: Final answer
    x = 135,656.02

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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.