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Finding the Fourth Proportional to 292,651.65, 438,978.42 and 79,420.77

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Solution

The fourth proportional to 292,651.65, 438,978.42 and 79,420.77 is: 119,131.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,651.65 : 438,978.42 = 79,420.77 : x
  2. Step 2: Convert to fraction form
    292,651.65/438,978.42 = 79,420.77/x
  3. Step 3: Cross multiply
    292,651.65x = 438,978.42 × 79,420.77
  4. Step 4: Simplify right side
    292,651.65x = 34,864,004,129.78
  5. Step 5: Solve for x
    x = 34,864,004,129.78/292,651.65
  6. Step 6: Final answer
    x = 119,131.41

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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.