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Finding the Fourth Proportional to 665,564.80, 997,666.80 and 328,086.40

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Solution

The fourth proportional to 665,564.80, 997,666.80 and 328,086.40 is: 491,794.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,564.80 : 997,666.80 = 328,086.40 : x
  2. Step 2: Convert to fraction form
    665,564.80/997,666.80 = 328,086.40/x
  3. Step 3: Cross multiply
    665,564.80x = 997,666.80 × 328,086.40
  4. Step 4: Simplify right side
    665,564.80x = 327,320,908,811.52
  5. Step 5: Solve for x
    x = 327,320,908,811.52/665,564.80
  6. Step 6: Final answer
    x = 491,794.20

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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.