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Finding the Fourth Proportional to 318,941.70, 478,412.55 and 178,682.10

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Solution

The fourth proportional to 318,941.70, 478,412.55 and 178,682.10 is: 268,023.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,941.70 : 478,412.55 = 178,682.10 : x
  2. Step 2: Convert to fraction form
    318,941.70/478,412.55 = 178,682.10/x
  3. Step 3: Cross multiply
    318,941.70x = 478,412.55 × 178,682.10
  4. Step 4: Simplify right side
    318,941.70x = 85,483,759,100.36
  5. Step 5: Solve for x
    x = 85,483,759,100.36/318,941.70
  6. Step 6: Final answer
    x = 268,023.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.