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Finding the Fourth Proportional to 690,780.30, 953,211.69 and 384,825.48

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Solution

The fourth proportional to 690,780.30, 953,211.69 and 384,825.48 is: 531,022.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,780.30 : 953,211.69 = 384,825.48 : x
  2. Step 2: Convert to fraction form
    690,780.30/953,211.69 = 384,825.48/x
  3. Step 3: Cross multiply
    690,780.30x = 953,211.69 × 384,825.48
  4. Step 4: Simplify right side
    690,780.30x = 366,820,146,145.86
  5. Step 5: Solve for x
    x = 366,820,146,145.86/690,780.30
  6. Step 6: Final answer
    x = 531,022.88

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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.