Home / 1,385,980.32-1,912,632.66-774,141.78

Finding the Fourth Proportional to 1,385,980.32, 1,912,632.66 and 774,141.78

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Solution

The fourth proportional to 1,385,980.32, 1,912,632.66 and 774,141.78 is: 1,068,304.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385,980.32 : 1,912,632.66 = 774,141.78 : x
  2. Step 2: Convert to fraction form
    1,385,980.32/1,912,632.66 = 774,141.78/x
  3. Step 3: Cross multiply
    1,385,980.32x = 1,912,632.66 × 774,141.78
  4. Step 4: Simplify right side
    1,385,980.32x = 1,480,648,851,898.53
  5. Step 5: Solve for x
    x = 1,480,648,851,898.53/1,385,980.32
  6. Step 6: Final answer
    x = 1,068,304.38

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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.