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Finding the Fourth Proportional to 690,972.63, 953,034.68 and 457,978.20

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Solution

The fourth proportional to 690,972.63, 953,034.68 and 457,978.20 is: 631,673.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,972.63 : 953,034.68 = 457,978.20 : x
  2. Step 2: Convert to fraction form
    690,972.63/953,034.68 = 457,978.20/x
  3. Step 3: Cross multiply
    690,972.63x = 953,034.68 × 457,978.20
  4. Step 4: Simplify right side
    690,972.63x = 436,469,104,994.09
  5. Step 5: Solve for x
    x = 436,469,104,994.09/690,972.63
  6. Step 6: Final answer
    x = 631,673.51

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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.