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Finding the Fourth Proportional to 630,687.10, 870,350.61 and 344,213.50

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Solution

The fourth proportional to 630,687.10, 870,350.61 and 344,213.50 is: 475,015.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,687.10 : 870,350.61 = 344,213.50 : x
  2. Step 2: Convert to fraction form
    630,687.10/870,350.61 = 344,213.50/x
  3. Step 3: Cross multiply
    630,687.10x = 870,350.61 × 344,213.50
  4. Step 4: Simplify right side
    630,687.10x = 299,586,429,695.24
  5. Step 5: Solve for x
    x = 299,586,429,695.24/630,687.10
  6. Step 6: Final answer
    x = 475,015.95

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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.