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Finding the Fourth Proportional to 383,670, 529,465.65 and 211,583.70

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Solution

The fourth proportional to 383,670, 529,465.65 and 211,583.70 is: 291,986.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,670 : 529,465.65 = 211,583.70 : x
  2. Step 2: Convert to fraction form
    383,670/529,465.65 = 211,583.70/x
  3. Step 3: Cross multiply
    383,670x = 529,465.65 × 211,583.70
  4. Step 4: Simplify right side
    383,670x = 112,026,301,249.91
  5. Step 5: Solve for x
    x = 112,026,301,249.91/383,670
  6. Step 6: Final answer
    x = 291,986.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.