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Finding the Fourth Proportional to 290,307.21, 435,460.86 and 90,644.70

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Solution

The fourth proportional to 290,307.21, 435,460.86 and 90,644.70 is: 135,967.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,307.21 : 435,460.86 = 90,644.70 : x
  2. Step 2: Convert to fraction form
    290,307.21/435,460.86 = 90,644.70/x
  3. Step 3: Cross multiply
    290,307.21x = 435,460.86 × 90,644.70
  4. Step 4: Simplify right side
    290,307.21x = 39,472,219,016.44
  5. Step 5: Solve for x
    x = 39,472,219,016.44/290,307.21
  6. Step 6: Final answer
    x = 135,967.06

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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.