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Finding the Fourth Proportional to 668,320.69, 1,002,080.69 and 212,715.13

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Solution

The fourth proportional to 668,320.69, 1,002,080.69 and 212,715.13 is: 318,945.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,320.69 : 1,002,080.69 = 212,715.13 : x
  2. Step 2: Convert to fraction form
    668,320.69/1,002,080.69 = 212,715.13/x
  3. Step 3: Cross multiply
    668,320.69x = 1,002,080.69 × 212,715.13
  4. Step 4: Simplify right side
    668,320.69x = 213,157,718,169.86
  5. Step 5: Solve for x
    x = 213,157,718,169.86/668,320.69
  6. Step 6: Final answer
    x = 318,945.27

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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.