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Finding the Fourth Proportional to 665,636.10, 997,798.05 and 328,400.70

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Solution

The fourth proportional to 665,636.10, 997,798.05 and 328,400.70 is: 492,277.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,636.10 : 997,798.05 = 328,400.70 : x
  2. Step 2: Convert to fraction form
    665,636.10/997,798.05 = 328,400.70/x
  3. Step 3: Cross multiply
    665,636.10x = 997,798.05 × 328,400.70
  4. Step 4: Simplify right side
    665,636.10x = 327,677,578,078.64
  5. Step 5: Solve for x
    x = 327,677,578,078.64/665,636.10
  6. Step 6: Final answer
    x = 492,277.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.