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Finding the Fourth Proportional to 318,230.57, 477,348.59 and 81,575.30

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Solution

The fourth proportional to 318,230.57, 477,348.59 and 81,575.30 is: 122,363.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,230.57 : 477,348.59 = 81,575.30 : x
  2. Step 2: Convert to fraction form
    318,230.57/477,348.59 = 81,575.30/x
  3. Step 3: Cross multiply
    318,230.57x = 477,348.59 × 81,575.30
  4. Step 4: Simplify right side
    318,230.57x = 38,939,855,831.14
  5. Step 5: Solve for x
    x = 38,939,855,831.14/318,230.57
  6. Step 6: Final answer
    x = 122,363.65

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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.