Home / 1,421,693.73-1,961,937.20-777,116.50

Finding the Fourth Proportional to 1,421,693.73, 1,961,937.20 and 777,116.50

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Solution

The fourth proportional to 1,421,693.73, 1,961,937.20 and 777,116.50 is: 1,072,420.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421,693.73 : 1,961,937.20 = 777,116.50 : x
  2. Step 2: Convert to fraction form
    1,421,693.73/1,961,937.20 = 777,116.50/x
  3. Step 3: Cross multiply
    1,421,693.73x = 1,961,937.20 × 777,116.50
  4. Step 4: Simplify right side
    1,421,693.73x = 1,524,653,767,121.75
  5. Step 5: Solve for x
    x = 1,524,653,767,121.75/1,421,693.73
  6. Step 6: Final answer
    x = 1,072,420.69

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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.