Home / 641,815.36-885,712.16-355,340.16

Finding the Fourth Proportional to 641,815.36, 885,712.16 and 355,340.16

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Solution

The fourth proportional to 641,815.36, 885,712.16 and 355,340.16 is: 490,373.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,815.36 : 885,712.16 = 355,340.16 : x
  2. Step 2: Convert to fraction form
    641,815.36/885,712.16 = 355,340.16/x
  3. Step 3: Cross multiply
    641,815.36x = 885,712.16 × 355,340.16
  4. Step 4: Simplify right side
    641,815.36x = 314,729,100,648.35
  5. Step 5: Solve for x
    x = 314,729,100,648.35/641,815.36
  6. Step 6: Final answer
    x = 490,373.28

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1.5x scale

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.