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Finding the Fourth Proportional to 290,238.99, 435,360.91 and 79,888.47

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Solution

The fourth proportional to 290,238.99, 435,360.91 and 79,888.47 is: 119,833.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,238.99 : 435,360.91 = 79,888.47 : x
  2. Step 2: Convert to fraction form
    290,238.99/435,360.91 = 79,888.47/x
  3. Step 3: Cross multiply
    290,238.99x = 435,360.91 × 79,888.47
  4. Step 4: Simplify right side
    290,238.99x = 34,780,316,997.71
  5. Step 5: Solve for x
    x = 34,780,316,997.71/290,238.99
  6. Step 6: Final answer
    x = 119,833.37

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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.