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Finding the Fourth Proportional to 290,073.60, 435,110.40 and 165,427.20

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Solution

The fourth proportional to 290,073.60, 435,110.40 and 165,427.20 is: 248,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,073.60 : 435,110.40 = 165,427.20 : x
  2. Step 2: Convert to fraction form
    290,073.60/435,110.40 = 165,427.20/x
  3. Step 3: Cross multiply
    290,073.60x = 435,110.40 × 165,427.20
  4. Step 4: Simplify right side
    290,073.60x = 71,979,095,162.88
  5. Step 5: Solve for x
    x = 71,979,095,162.88/290,073.60
  6. Step 6: Final answer
    x = 248,140.80

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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.