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Finding the Fourth Proportional to 290,592.80, 435,889.18 and 90,914.90

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Solution

The fourth proportional to 290,592.80, 435,889.18 and 90,914.90 is: 136,372.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,592.80 : 435,889.18 = 90,914.90 : x
  2. Step 2: Convert to fraction form
    290,592.80/435,889.18 = 90,914.90/x
  3. Step 3: Cross multiply
    290,592.80x = 435,889.18 × 90,914.90
  4. Step 4: Simplify right side
    290,592.80x = 39,628,821,210.78
  5. Step 5: Solve for x
    x = 39,628,821,210.78/290,592.80
  6. Step 6: Final answer
    x = 136,372.34

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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.