Home / 1,388,689.90-1,916,314.98-776,724.45

Finding the Fourth Proportional to 1,388,689.90, 1,916,314.98 and 776,724.45

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Solution

The fourth proportional to 1,388,689.90, 1,916,314.98 and 776,724.45 is: 1,071,836.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,689.90 : 1,916,314.98 = 776,724.45 : x
  2. Step 2: Convert to fraction form
    1,388,689.90/1,916,314.98 = 776,724.45/x
  3. Step 3: Cross multiply
    1,388,689.90x = 1,916,314.98 × 776,724.45
  4. Step 4: Simplify right side
    1,388,689.90x = 1,488,448,696,669.34
  5. Step 5: Solve for x
    x = 1,488,448,696,669.34/1,388,689.90
  6. Step 6: Final answer
    x = 1,071,836.62

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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.