Home / 778,417.29-1,074,215.39-420,721.29

Finding the Fourth Proportional to 778,417.29, 1,074,215.39 and 420,721.29

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Solution

The fourth proportional to 778,417.29, 1,074,215.39 and 420,721.29 is: 580,595.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,417.29 : 1,074,215.39 = 420,721.29 : x
  2. Step 2: Convert to fraction form
    778,417.29/1,074,215.39 = 420,721.29/x
  3. Step 3: Cross multiply
    778,417.29x = 1,074,215.39 × 420,721.29
  4. Step 4: Simplify right side
    778,417.29x = 451,945,282,515.05
  5. Step 5: Solve for x
    x = 451,945,282,515.05/778,417.29
  6. Step 6: Final answer
    x = 580,595.12

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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.