Home / 1,388,173.28-1,915,776.77-776,382.98

Finding the Fourth Proportional to 1,388,173.28, 1,915,776.77 and 776,382.98

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Solution

The fourth proportional to 1,388,173.28, 1,915,776.77 and 776,382.98 is: 1,071,463.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,173.28 : 1,915,776.77 = 776,382.98 : x
  2. Step 2: Convert to fraction form
    1,388,173.28/1,915,776.77 = 776,382.98/x
  3. Step 3: Cross multiply
    1,388,173.28x = 1,915,776.77 × 776,382.98
  4. Step 4: Simplify right side
    1,388,173.28x = 1,487,376,464,246.58
  5. Step 5: Solve for x
    x = 1,487,376,464,246.58/1,388,173.28
  6. Step 6: Final answer
    x = 1,071,463.12

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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.