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Finding the Fourth Proportional to 355,154.18, 490,123.31 and 194,011.90

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Solution

The fourth proportional to 355,154.18, 490,123.31 and 194,011.90 is: 267,742.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,154.18 : 490,123.31 = 194,011.90 : x
  2. Step 2: Convert to fraction form
    355,154.18/490,123.31 = 194,011.90/x
  3. Step 3: Cross multiply
    355,154.18x = 490,123.31 × 194,011.90
  4. Step 4: Simplify right side
    355,154.18x = 95,089,752,412.02
  5. Step 5: Solve for x
    x = 95,089,752,412.02/355,154.18
  6. Step 6: Final answer
    x = 267,742.18

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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.