Home / 1,386,576.82-1,913,300.15-813,407.86

Finding the Fourth Proportional to 1,386,576.82, 1,913,300.15 and 813,407.86

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Solution

The fourth proportional to 1,386,576.82, 1,913,300.15 and 813,407.86 is: 1,122,399.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,576.82 : 1,913,300.15 = 813,407.86 : x
  2. Step 2: Convert to fraction form
    1,386,576.82/1,913,300.15 = 813,407.86/x
  3. Step 3: Cross multiply
    1,386,576.82x = 1,913,300.15 × 813,407.86
  4. Step 4: Simplify right side
    1,386,576.82x = 1,556,293,381,924.04
  5. Step 5: Solve for x
    x = 1,556,293,381,924.04/1,386,576.82
  6. Step 6: Final answer
    x = 1,122,399.68

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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.