Home / 1,381,892.40-1,906,986.24-778,280.40

Finding the Fourth Proportional to 1,381,892.40, 1,906,986.24 and 778,280.40

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Solution

The fourth proportional to 1,381,892.40, 1,906,986.24 and 778,280.40 is: 1,074,012.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381,892.40 : 1,906,986.24 = 778,280.40 : x
  2. Step 2: Convert to fraction form
    1,381,892.40/1,906,986.24 = 778,280.40/x
  3. Step 3: Cross multiply
    1,381,892.40x = 1,906,986.24 × 778,280.40
  4. Step 4: Simplify right side
    1,381,892.40x = 1,484,170,013,661.70
  5. Step 5: Solve for x
    x = 1,484,170,013,661.70/1,381,892.40
  6. Step 6: Final answer
    x = 1,074,012.72

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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.