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Finding the Fourth Proportional to 383,690.20, 575,535.30 and 361,917.40

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Solution

The fourth proportional to 383,690.20, 575,535.30 and 361,917.40 is: 542,876.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,690.20 : 575,535.30 = 361,917.40 : x
  2. Step 2: Convert to fraction form
    383,690.20/575,535.30 = 361,917.40/x
  3. Step 3: Cross multiply
    383,690.20x = 575,535.30 × 361,917.40
  4. Step 4: Simplify right side
    383,690.20x = 208,296,239,384.22
  5. Step 5: Solve for x
    x = 208,296,239,384.22/383,690.20
  6. Step 6: Final answer
    x = 542,876.10

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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.