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Finding the Fourth Proportional to 292,619.30, 438,958.15 and 79,390.55

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Solution

The fourth proportional to 292,619.30, 438,958.15 and 79,390.55 is: 119,093.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,619.30 : 438,958.15 = 79,390.55 : x
  2. Step 2: Convert to fraction form
    292,619.30/438,958.15 = 79,390.55/x
  3. Step 3: Cross multiply
    292,619.30x = 438,958.15 × 79,390.55
  4. Step 4: Simplify right side
    292,619.30x = 34,849,129,854.40
  5. Step 5: Solve for x
    x = 34,849,129,854.40/292,619.30
  6. Step 6: Final answer
    x = 119,093.75

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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.