Home / 641,780.64-885,669.84-355,292.64

Finding the Fourth Proportional to 641,780.64, 885,669.84 and 355,292.64

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Solution

The fourth proportional to 641,780.64, 885,669.84 and 355,292.64 is: 490,310.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,780.64 : 885,669.84 = 355,292.64 : x
  2. Step 2: Convert to fraction form
    641,780.64/885,669.84 = 355,292.64/x
  3. Step 3: Cross multiply
    641,780.64x = 885,669.84 × 355,292.64
  4. Step 4: Simplify right side
    641,780.64x = 314,671,975,621.98
  5. Step 5: Solve for x
    x = 314,671,975,621.98/641,780.64
  6. Step 6: Final answer
    x = 490,310.79

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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.