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Finding the Fourth Proportional to 318,315.60, 439,128.27 and 190,769.76

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Solution

The fourth proportional to 318,315.60, 439,128.27 and 190,769.76 is: 263,174.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,315.60 : 439,128.27 = 190,769.76 : x
  2. Step 2: Convert to fraction form
    318,315.60/439,128.27 = 190,769.76/x
  3. Step 3: Cross multiply
    318,315.60x = 439,128.27 × 190,769.76
  4. Step 4: Simplify right side
    318,315.60x = 83,772,394,677.12
  5. Step 5: Solve for x
    x = 83,772,394,677.12/318,315.60
  6. Step 6: Final answer
    x = 263,174.02

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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.