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Finding the Fourth Proportional to 630,965.89, 870,728.37 and 344,485.98

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Solution

The fourth proportional to 630,965.89, 870,728.37 and 344,485.98 is: 475,388.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,965.89 : 870,728.37 = 344,485.98 : x
  2. Step 2: Convert to fraction form
    630,965.89/870,728.37 = 344,485.98/x
  3. Step 3: Cross multiply
    630,965.89x = 870,728.37 × 344,485.98
  4. Step 4: Simplify right side
    630,965.89x = 299,953,713,794.65
  5. Step 5: Solve for x
    x = 299,953,713,794.65/630,965.89
  6. Step 6: Final answer
    x = 475,388.16

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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.