Home / 1,290,409.18-1,780,864.41-774,182.50

Finding the Fourth Proportional to 1,290,409.18, 1,780,864.41 and 774,182.50

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Solution

The fourth proportional to 1,290,409.18, 1,780,864.41 and 774,182.50 is: 1,068,431.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,409.18 : 1,780,864.41 = 774,182.50 : x
  2. Step 2: Convert to fraction form
    1,290,409.18/1,780,864.41 = 774,182.50/x
  3. Step 3: Cross multiply
    1,290,409.18x = 1,780,864.41 × 774,182.50
  4. Step 4: Simplify right side
    1,290,409.18x = 1,378,714,059,545.85
  5. Step 5: Solve for x
    x = 1,378,714,059,545.85/1,290,409.18
  6. Step 6: Final answer
    x = 1,068,431.69

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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.