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Finding the Fourth Proportional to 290,352.80, 435,516.96 and 90,671.60

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Solution

The fourth proportional to 290,352.80, 435,516.96 and 90,671.60 is: 136,003.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,352.80 : 435,516.96 = 90,671.60 : x
  2. Step 2: Convert to fraction form
    290,352.80/435,516.96 = 90,671.60/x
  3. Step 3: Cross multiply
    290,352.80x = 435,516.96 × 90,671.60
  4. Step 4: Simplify right side
    290,352.80x = 39,489,019,590.34
  5. Step 5: Solve for x
    x = 39,489,019,590.34/290,352.80
  6. Step 6: Final answer
    x = 136,003.58

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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.