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Finding the Fourth Proportional to 290,471.90, 435,708.18 and 90,793.34

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Solution

The fourth proportional to 290,471.90, 435,708.18 and 90,793.34 is: 136,190.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,471.90 : 435,708.18 = 90,793.34 : x
  2. Step 2: Convert to fraction form
    290,471.90/435,708.18 = 90,793.34/x
  3. Step 3: Cross multiply
    290,471.90x = 435,708.18 × 90,793.34
  4. Step 4: Simplify right side
    290,471.90x = 39,559,400,927.52
  5. Step 5: Solve for x
    x = 39,559,400,927.52/290,471.90
  6. Step 6: Final answer
    x = 136,190.11

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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.