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Finding the Fourth Proportional to 630,507.08, 870,229.26 and 385,533.72

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Solution

The fourth proportional to 630,507.08, 870,229.26 and 385,533.72 is: 532,115.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,507.08 : 870,229.26 = 385,533.72 : x
  2. Step 2: Convert to fraction form
    630,507.08/870,229.26 = 385,533.72/x
  3. Step 3: Cross multiply
    630,507.08x = 870,229.26 × 385,533.72
  4. Step 4: Simplify right side
    630,507.08x = 335,502,723,860.65
  5. Step 5: Solve for x
    x = 335,502,723,860.65/630,507.08
  6. Step 6: Final answer
    x = 532,115.71

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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.