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Finding the Fourth Proportional to 290,211.40, 435,054.64 and 103,179.16

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Solution

The fourth proportional to 290,211.40, 435,054.64 and 103,179.16 is: 154,675.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,211.40 : 435,054.64 = 103,179.16 : x
  2. Step 2: Convert to fraction form
    290,211.40/435,054.64 = 103,179.16/x
  3. Step 3: Cross multiply
    290,211.40x = 435,054.64 × 103,179.16
  4. Step 4: Simplify right side
    290,211.40x = 44,888,572,309.30
  5. Step 5: Solve for x
    x = 44,888,572,309.30/290,211.40
  6. Step 6: Final answer
    x = 154,675.43

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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.