Home / 1,391,925.50-1,920,824.52-819,002.78

Finding the Fourth Proportional to 1,391,925.50, 1,920,824.52 and 819,002.78

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Solution

The fourth proportional to 1,391,925.50, 1,920,824.52 and 819,002.78 is: 1,130,204.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,925.50 : 1,920,824.52 = 819,002.78 : x
  2. Step 2: Convert to fraction form
    1,391,925.50/1,920,824.52 = 819,002.78/x
  3. Step 3: Cross multiply
    1,391,925.50x = 1,920,824.52 × 819,002.78
  4. Step 4: Simplify right side
    1,391,925.50x = 1,573,160,621,772.17
  5. Step 5: Solve for x
    x = 1,573,160,621,772.17/1,391,925.50
  6. Step 6: Final answer
    x = 1,130,204.61

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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.