Home / 1,290,411.50-1,780,867.60-774,184.82

Finding the Fourth Proportional to 1,290,411.50, 1,780,867.60 and 774,184.82

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Solution

The fourth proportional to 1,290,411.50, 1,780,867.60 and 774,184.82 is: 1,068,434.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,411.50 : 1,780,867.60 = 774,184.82 : x
  2. Step 2: Convert to fraction form
    1,290,411.50/1,780,867.60 = 774,184.82/x
  3. Step 3: Cross multiply
    1,290,411.50x = 1,780,867.60 × 774,184.82
  4. Step 4: Simplify right side
    1,290,411.50x = 1,378,720,662,349.83
  5. Step 5: Solve for x
    x = 1,378,720,662,349.83/1,290,411.50
  6. Step 6: Final answer
    x = 1,068,434.88

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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.