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Finding the Fourth Proportional to 318,491.75, 439,505.42 and 173,298.14

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Solution

The fourth proportional to 318,491.75, 439,505.42 and 173,298.14 is: 239,144.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,491.75 : 439,505.42 = 173,298.14 : x
  2. Step 2: Convert to fraction form
    318,491.75/439,505.42 = 173,298.14/x
  3. Step 3: Cross multiply
    318,491.75x = 439,505.42 × 173,298.14
  4. Step 4: Simplify right side
    318,491.75x = 76,165,470,041.64
  5. Step 5: Solve for x
    x = 76,165,470,041.64/318,491.75
  6. Step 6: Final answer
    x = 239,144.25

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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.