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Finding the Fourth Proportional to 630,920.38, 870,665.70 and 344,440.48

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Solution

The fourth proportional to 630,920.38, 870,665.70 and 344,440.48 is: 475,325.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,920.38 : 870,665.70 = 344,440.48 : x
  2. Step 2: Convert to fraction form
    630,920.38/870,665.70 = 344,440.48/x
  3. Step 3: Cross multiply
    630,920.38x = 870,665.70 × 344,440.48
  4. Step 4: Simplify right side
    630,920.38x = 299,892,511,627.54
  5. Step 5: Solve for x
    x = 299,892,511,627.54/630,920.38
  6. Step 6: Final answer
    x = 475,325.45

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1.5x scale

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.