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Finding the Fourth Proportional to 405,730.62, 560,367.72 and 276,444.90

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Solution

The fourth proportional to 405,730.62, 560,367.72 and 276,444.90 is: 381,807.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,730.62 : 560,367.72 = 276,444.90 : x
  2. Step 2: Convert to fraction form
    405,730.62/560,367.72 = 276,444.90/x
  3. Step 3: Cross multiply
    405,730.62x = 560,367.72 × 276,444.90
  4. Step 4: Simplify right side
    405,730.62x = 154,910,798,318.63
  5. Step 5: Solve for x
    x = 154,910,798,318.63/405,730.62
  6. Step 6: Final answer
    x = 381,807.02

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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.