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Finding the Fourth Proportional to 570,380.45, 856,411.74 and 318,153.74

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Solution

The fourth proportional to 570,380.45, 856,411.74 and 318,153.74 is: 477,699.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,380.45 : 856,411.74 = 318,153.74 : x
  2. Step 2: Convert to fraction form
    570,380.45/856,411.74 = 318,153.74/x
  3. Step 3: Cross multiply
    570,380.45x = 856,411.74 × 318,153.74
  4. Step 4: Simplify right side
    570,380.45x = 272,470,593,778.85
  5. Step 5: Solve for x
    x = 272,470,593,778.85/570,380.45
  6. Step 6: Final answer
    x = 477,699.75

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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.