Home / 685,747.80-1,026,653.40-420,027.30

Finding the Fourth Proportional to 685,747.80, 1,026,653.40 and 420,027.30

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Solution

The fourth proportional to 685,747.80, 1,026,653.40 and 420,027.30 is: 628,835.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,747.80 : 1,026,653.40 = 420,027.30 : x
  2. Step 2: Convert to fraction form
    685,747.80/1,026,653.40 = 420,027.30/x
  3. Step 3: Cross multiply
    685,747.80x = 1,026,653.40 × 420,027.30
  4. Step 4: Simplify right side
    685,747.80x = 431,222,455,637.82
  5. Step 5: Solve for x
    x = 431,222,455,637.82/685,747.80
  6. Step 6: Final answer
    x = 628,835.35

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1.5x scale

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.