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Finding the Fourth Proportional to 385,215.60, 531,594.48 and 215,449.60

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Solution

The fourth proportional to 385,215.60, 531,594.48 and 215,449.60 is: 297,318.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,215.60 : 531,594.48 = 215,449.60 : x
  2. Step 2: Convert to fraction form
    385,215.60/531,594.48 = 215,449.60/x
  3. Step 3: Cross multiply
    385,215.60x = 531,594.48 × 215,449.60
  4. Step 4: Simplify right side
    385,215.60x = 114,531,818,078.21
  5. Step 5: Solve for x
    x = 114,531,818,078.21/385,215.60
  6. Step 6: Final answer
    x = 297,318.74

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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.