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Finding the Fourth Proportional to 290,012.68, 434,999.58 and 79,633

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Solution

The fourth proportional to 290,012.68, 434,999.58 and 79,633 is: 119,444.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,012.68 : 434,999.58 = 79,633 : x
  2. Step 2: Convert to fraction form
    290,012.68/434,999.58 = 79,633/x
  3. Step 3: Cross multiply
    290,012.68x = 434,999.58 × 79,633
  4. Step 4: Simplify right side
    290,012.68x = 34,640,321,554.14
  5. Step 5: Solve for x
    x = 34,640,321,554.14/290,012.68
  6. Step 6: Final answer
    x = 119,444.16

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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.