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Finding the Fourth Proportional to 316,290.28, 436,437.48 and 188,938.84

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Solution

The fourth proportional to 316,290.28, 436,437.48 and 188,938.84 is: 260,709.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,290.28 : 436,437.48 = 188,938.84 : x
  2. Step 2: Convert to fraction form
    316,290.28/436,437.48 = 188,938.84/x
  3. Step 3: Cross multiply
    316,290.28x = 436,437.48 × 188,938.84
  4. Step 4: Simplify right side
    316,290.28x = 82,459,991,203.72
  5. Step 5: Solve for x
    x = 82,459,991,203.72/316,290.28
  6. Step 6: Final answer
    x = 260,709.85

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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.