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Finding the Fourth Proportional to 290,465.40, 435,698.10 and 269,470.20

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Solution

The fourth proportional to 290,465.40, 435,698.10 and 269,470.20 is: 404,205.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,465.40 : 435,698.10 = 269,470.20 : x
  2. Step 2: Convert to fraction form
    290,465.40/435,698.10 = 269,470.20/x
  3. Step 3: Cross multiply
    290,465.40x = 435,698.10 × 269,470.20
  4. Step 4: Simplify right side
    290,465.40x = 117,407,654,146.62
  5. Step 5: Solve for x
    x = 117,407,654,146.62/290,465.40
  6. Step 6: Final answer
    x = 404,205.30

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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.