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Finding the Fourth Proportional to 399,037.94, 550,670.14 and 217,749.32

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Solution

The fourth proportional to 399,037.94, 550,670.14 and 217,749.32 is: 300,492.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,037.94 : 550,670.14 = 217,749.32 : x
  2. Step 2: Convert to fraction form
    399,037.94/550,670.14 = 217,749.32/x
  3. Step 3: Cross multiply
    399,037.94x = 550,670.14 × 217,749.32
  4. Step 4: Simplify right side
    399,037.94x = 119,908,048,529.31
  5. Step 5: Solve for x
    x = 119,908,048,529.31/399,037.94
  6. Step 6: Final answer
    x = 300,492.85

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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.