Home / 1,319,703.78-1,979,590.07-421,144.31

Finding the Fourth Proportional to 1,319,703.78, 1,979,590.07 and 421,144.31

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Solution

The fourth proportional to 1,319,703.78, 1,979,590.07 and 421,144.31 is: 631,727.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,703.78 : 1,979,590.07 = 421,144.31 : x
  2. Step 2: Convert to fraction form
    1,319,703.78/1,979,590.07 = 421,144.31/x
  3. Step 3: Cross multiply
    1,319,703.78x = 1,979,590.07 × 421,144.31
  4. Step 4: Simplify right side
    1,319,703.78x = 833,693,082,109.33
  5. Step 5: Solve for x
    x = 833,693,082,109.33/1,319,703.78
  6. Step 6: Final answer
    x = 631,727.43

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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.