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Finding the Fourth Proportional to 452,319.32, 681,730.21 and 389,892.90

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Solution

The fourth proportional to 452,319.32, 681,730.21 and 389,892.90 is: 587,641.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,319.32 : 681,730.21 = 389,892.90 : x
  2. Step 2: Convert to fraction form
    452,319.32/681,730.21 = 389,892.90/x
  3. Step 3: Cross multiply
    452,319.32x = 681,730.21 × 389,892.90
  4. Step 4: Simplify right side
    452,319.32x = 265,801,768,594.51
  5. Step 5: Solve for x
    x = 265,801,768,594.51/452,319.32
  6. Step 6: Final answer
    x = 587,641.86

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.