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Finding the Fourth Proportional to 630,603.72, 870,261.48 and 355,056.45

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Solution

The fourth proportional to 630,603.72, 870,261.48 and 355,056.45 is: 489,993.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,603.72 : 870,261.48 = 355,056.45 : x
  2. Step 2: Convert to fraction form
    630,603.72/870,261.48 = 355,056.45/x
  3. Step 3: Cross multiply
    630,603.72x = 870,261.48 × 355,056.45
  4. Step 4: Simplify right side
    630,603.72x = 308,991,951,660.55
  5. Step 5: Solve for x
    x = 308,991,951,660.55/630,603.72
  6. Step 6: Final answer
    x = 489,993.86

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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.