Home / 1,388,671.70-1,916,276.47-776,718.32

Finding the Fourth Proportional to 1,388,671.70, 1,916,276.47 and 776,718.32

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Solution

The fourth proportional to 1,388,671.70, 1,916,276.47 and 776,718.32 is: 1,071,820.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,671.70 : 1,916,276.47 = 776,718.32 : x
  2. Step 2: Convert to fraction form
    1,388,671.70/1,916,276.47 = 776,718.32/x
  3. Step 3: Cross multiply
    1,388,671.70x = 1,916,276.47 × 776,718.32
  4. Step 4: Simplify right side
    1,388,671.70x = 1,488,407,028,910.75
  5. Step 5: Solve for x
    x = 1,488,407,028,910.75/1,388,671.70
  6. Step 6: Final answer
    x = 1,071,820.67

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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.