Home / 778,721.50-1,074,635.67-421,025.50

Finding the Fourth Proportional to 778,721.50, 1,074,635.67 and 421,025.50

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Solution

The fourth proportional to 778,721.50, 1,074,635.67 and 421,025.50 is: 581,015.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,721.50 : 1,074,635.67 = 421,025.50 : x
  2. Step 2: Convert to fraction form
    778,721.50/1,074,635.67 = 421,025.50/x
  3. Step 3: Cross multiply
    778,721.50x = 1,074,635.67 × 421,025.50
  4. Step 4: Simplify right side
    778,721.50x = 452,449,020,279.59
  5. Step 5: Solve for x
    x = 452,449,020,279.59/778,721.50
  6. Step 6: Final answer
    x = 581,015.19

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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.