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Finding the Fourth Proportional to 290,468.40, 435,702.96 and 90,789.81

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Solution

The fourth proportional to 290,468.40, 435,702.96 and 90,789.81 is: 136,184.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,468.40 : 435,702.96 = 90,789.81 : x
  2. Step 2: Convert to fraction form
    290,468.40/435,702.96 = 90,789.81/x
  3. Step 3: Cross multiply
    290,468.40x = 435,702.96 × 90,789.81
  4. Step 4: Simplify right side
    290,468.40x = 39,557,388,954.84
  5. Step 5: Solve for x
    x = 39,557,388,954.84/290,468.40
  6. Step 6: Final answer
    x = 136,184.83

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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.