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Finding the Fourth Proportional to 290,458.16, 435,687.59 and 90,779.60

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Solution

The fourth proportional to 290,458.16, 435,687.59 and 90,779.60 is: 136,169.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,458.16 : 435,687.59 = 90,779.60 : x
  2. Step 2: Convert to fraction form
    290,458.16/435,687.59 = 90,779.60/x
  3. Step 3: Cross multiply
    290,458.16x = 435,687.59 × 90,779.60
  4. Step 4: Simplify right side
    290,458.16x = 39,551,542,512.83
  5. Step 5: Solve for x
    x = 39,551,542,512.83/290,458.16
  6. Step 6: Final answer
    x = 136,169.50

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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.