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Finding the Fourth Proportional to 318,678.72, 478,101.12 and 119,000.80

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Solution

The fourth proportional to 318,678.72, 478,101.12 and 119,000.80 is: 178,532.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,678.72 : 478,101.12 = 119,000.80 : x
  2. Step 2: Convert to fraction form
    318,678.72/478,101.12 = 119,000.80/x
  3. Step 3: Cross multiply
    318,678.72x = 478,101.12 × 119,000.80
  4. Step 4: Simplify right side
    318,678.72x = 56,894,415,760.90
  5. Step 5: Solve for x
    x = 56,894,415,760.90/318,678.72
  6. Step 6: Final answer
    x = 178,532.21

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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.