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Finding the Fourth Proportional to 290,323.57, 435,485.18 and 90,661.06

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Solution

The fourth proportional to 290,323.57, 435,485.18 and 90,661.06 is: 135,991.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,323.57 : 435,485.18 = 90,661.06 : x
  2. Step 2: Convert to fraction form
    290,323.57/435,485.18 = 90,661.06/x
  3. Step 3: Cross multiply
    290,323.57x = 435,485.18 × 90,661.06
  4. Step 4: Simplify right side
    290,323.57x = 39,481,549,348.46
  5. Step 5: Solve for x
    x = 39,481,549,348.46/290,323.57
  6. Step 6: Final answer
    x = 135,991.54

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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.