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Finding the Fourth Proportional to 290,412.80, 435,619.20 and 219,449.60

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Solution

The fourth proportional to 290,412.80, 435,619.20 and 219,449.60 is: 329,174.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,412.80 : 435,619.20 = 219,449.60 : x
  2. Step 2: Convert to fraction form
    290,412.80/435,619.20 = 219,449.60/x
  3. Step 3: Cross multiply
    290,412.80x = 435,619.20 × 219,449.60
  4. Step 4: Simplify right side
    290,412.80x = 95,596,459,192.32
  5. Step 5: Solve for x
    x = 95,596,459,192.32/290,412.80
  6. Step 6: Final answer
    x = 329,174.40

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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.