Home / 743,015.56-1,025,365.40-420,788.40

Finding the Fourth Proportional to 743,015.56, 1,025,365.40 and 420,788.40

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Solution

The fourth proportional to 743,015.56, 1,025,365.40 and 420,788.40 is: 580,690.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,015.56 : 1,025,365.40 = 420,788.40 : x
  2. Step 2: Convert to fraction form
    743,015.56/1,025,365.40 = 420,788.40/x
  3. Step 3: Cross multiply
    743,015.56x = 1,025,365.40 × 420,788.40
  4. Step 4: Simplify right side
    743,015.56x = 431,461,866,081.36
  5. Step 5: Solve for x
    x = 431,461,866,081.36/743,015.56
  6. Step 6: Final answer
    x = 580,690.22

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1.5x scale

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.