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Finding the Fourth Proportional to 290,333.36, 435,499.84 and 90,670.86

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Solution

The fourth proportional to 290,333.36, 435,499.84 and 90,670.86 is: 136,006.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,333.36 : 435,499.84 = 90,670.86 : x
  2. Step 2: Convert to fraction form
    290,333.36/435,499.84 = 90,670.86/x
  3. Step 3: Cross multiply
    290,333.36x = 435,499.84 × 90,670.86
  4. Step 4: Simplify right side
    290,333.36x = 39,487,145,136.00
  5. Step 5: Solve for x
    x = 39,487,145,136.00/290,333.36
  6. Step 6: Final answer
    x = 136,006.23

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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.