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Finding the Fourth Proportional to 641,860.32, 885,774.24 and 355,385.44

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Solution

The fourth proportional to 641,860.32, 885,774.24 and 355,385.44 is: 490,435.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,860.32 : 885,774.24 = 355,385.44 : x
  2. Step 2: Convert to fraction form
    641,860.32/885,774.24 = 355,385.44/x
  3. Step 3: Cross multiply
    641,860.32x = 885,774.24 × 355,385.44
  4. Step 4: Simplify right side
    641,860.32x = 314,791,268,023.07
  5. Step 5: Solve for x
    x = 314,791,268,023.07/641,860.32
  6. Step 6: Final answer
    x = 490,435.78

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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.