Home / 1,387,954.70-1,915,366.65-776,108.64

Finding the Fourth Proportional to 1,387,954.70, 1,915,366.65 and 776,108.64

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Solution

The fourth proportional to 1,387,954.70, 1,915,366.65 and 776,108.64 is: 1,071,023.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,954.70 : 1,915,366.65 = 776,108.64 : x
  2. Step 2: Convert to fraction form
    1,387,954.70/1,915,366.65 = 776,108.64/x
  3. Step 3: Cross multiply
    1,387,954.70x = 1,915,366.65 × 776,108.64
  4. Step 4: Simplify right side
    1,387,954.70x = 1,486,532,605,832.86
  5. Step 5: Solve for x
    x = 1,486,532,605,832.86/1,387,954.70
  6. Step 6: Final answer
    x = 1,071,023.87

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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.