Home / 1,391,509.72-1,921,204.38-1,068,640.36

Finding the Fourth Proportional to 1,391,509.72, 1,921,204.38 and 1,068,640.36

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Solution

The fourth proportional to 1,391,509.72, 1,921,204.38 and 1,068,640.36 is: 1,475,430.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,509.72 : 1,921,204.38 = 1,068,640.36 : x
  2. Step 2: Convert to fraction form
    1,391,509.72/1,921,204.38 = 1,068,640.36/x
  3. Step 3: Cross multiply
    1,391,509.72x = 1,921,204.38 × 1,068,640.36
  4. Step 4: Simplify right side
    1,391,509.72x = 2,053,076,540,276.78
  5. Step 5: Solve for x
    x = 2,053,076,540,276.78/1,391,509.72
  6. Step 6: Final answer
    x = 1,475,430.97

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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.