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Finding the Fourth Proportional to 318,491.34, 439,532.50 and 197,671.54

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Solution

The fourth proportional to 318,491.34, 439,532.50 and 197,671.54 is: 272,795.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,491.34 : 439,532.50 = 197,671.54 : x
  2. Step 2: Convert to fraction form
    318,491.34/439,532.50 = 197,671.54/x
  3. Step 3: Cross multiply
    318,491.34x = 439,532.50 × 197,671.54
  4. Step 4: Simplify right side
    318,491.34x = 86,883,066,155.05
  5. Step 5: Solve for x
    x = 86,883,066,155.05/318,491.34
  6. Step 6: Final answer
    x = 272,795.69

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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.