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Finding the Fourth Proportional to 318,421.40, 476,940.90 and 263,125.40

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Solution

The fourth proportional to 318,421.40, 476,940.90 and 263,125.40 is: 394,116.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,421.40 : 476,940.90 = 263,125.40 : x
  2. Step 2: Convert to fraction form
    318,421.40/476,940.90 = 263,125.40/x
  3. Step 3: Cross multiply
    318,421.40x = 476,940.90 × 263,125.40
  4. Step 4: Simplify right side
    318,421.40x = 125,495,265,088.86
  5. Step 5: Solve for x
    x = 125,495,265,088.86/318,421.40
  6. Step 6: Final answer
    x = 394,116.93

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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.