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Finding the Fourth Proportional to 565,538.31, 780,445.41 and 310,905.90

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Solution

The fourth proportional to 565,538.31, 780,445.41 and 310,905.90 is: 429,051.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,538.31 : 780,445.41 = 310,905.90 : x
  2. Step 2: Convert to fraction form
    565,538.31/780,445.41 = 310,905.90/x
  3. Step 3: Cross multiply
    565,538.31x = 780,445.41 × 310,905.90
  4. Step 4: Simplify right side
    565,538.31x = 242,645,082,596.92
  5. Step 5: Solve for x
    x = 242,645,082,596.92/565,538.31
  6. Step 6: Final answer
    x = 429,051.54

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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.