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Finding the Fourth Proportional to 630,891.64, 870,631.86 and 344,411.80

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Solution

The fourth proportional to 630,891.64, 870,631.86 and 344,411.80 is: 475,289.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,891.64 : 870,631.86 = 344,411.80 : x
  2. Step 2: Convert to fraction form
    630,891.64/870,631.86 = 344,411.80/x
  3. Step 3: Cross multiply
    630,891.64x = 870,631.86 × 344,411.80
  4. Step 4: Simplify right side
    630,891.64x = 299,855,886,039.95
  5. Step 5: Solve for x
    x = 299,855,886,039.95/630,891.64
  6. Step 6: Final answer
    x = 475,289.05

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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.