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Finding the Fourth Proportional to 420,791.99, 580,543.40 and 248,673.47

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Solution

The fourth proportional to 420,791.99, 580,543.40 and 248,673.47 is: 343,081.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,791.99 : 580,543.40 = 248,673.47 : x
  2. Step 2: Convert to fraction form
    420,791.99/580,543.40 = 248,673.47/x
  3. Step 3: Cross multiply
    420,791.99x = 580,543.40 × 248,673.47
  4. Step 4: Simplify right side
    420,791.99x = 144,365,739,482.57
  5. Step 5: Solve for x
    x = 144,365,739,482.57/420,791.99
  6. Step 6: Final answer
    x = 343,081.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.