Home / 1,386,143.76-1,912,674.80-774,221.12

Finding the Fourth Proportional to 1,386,143.76, 1,912,674.80 and 774,221.12

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Solution

The fourth proportional to 1,386,143.76, 1,912,674.80 and 774,221.12 is: 1,068,311.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,143.76 : 1,912,674.80 = 774,221.12 : x
  2. Step 2: Convert to fraction form
    1,386,143.76/1,912,674.80 = 774,221.12/x
  3. Step 3: Cross multiply
    1,386,143.76x = 1,912,674.80 × 774,221.12
  4. Step 4: Simplify right side
    1,386,143.76x = 1,480,833,225,851.78
  5. Step 5: Solve for x
    x = 1,480,833,225,851.78/1,386,143.76
  6. Step 6: Final answer
    x = 1,068,311.43

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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.