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Finding the Fourth Proportional to 290,457.90, 435,555.63 and 103,474.26

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Solution

The fourth proportional to 290,457.90, 435,555.63 and 103,474.26 is: 155,164.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,457.90 : 435,555.63 = 103,474.26 : x
  2. Step 2: Convert to fraction form
    290,457.90/435,555.63 = 103,474.26/x
  3. Step 3: Cross multiply
    290,457.90x = 435,555.63 × 103,474.26
  4. Step 4: Simplify right side
    290,457.90x = 45,068,796,503.08
  5. Step 5: Solve for x
    x = 45,068,796,503.08/290,457.90
  6. Step 6: Final answer
    x = 155,164.64

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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.