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Finding the Fourth Proportional to 346,728.90, 520,093.35 and 287,631.30

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Solution

The fourth proportional to 346,728.90, 520,093.35 and 287,631.30 is: 431,446.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,728.90 : 520,093.35 = 287,631.30 : x
  2. Step 2: Convert to fraction form
    346,728.90/520,093.35 = 287,631.30/x
  3. Step 3: Cross multiply
    346,728.90x = 520,093.35 × 287,631.30
  4. Step 4: Simplify right side
    346,728.90x = 149,595,126,381.86
  5. Step 5: Solve for x
    x = 149,595,126,381.86/346,728.90
  6. Step 6: Final answer
    x = 431,446.95

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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.