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Finding the Fourth Proportional to 516,187.84, 712,320.80 and 289,842.88

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Solution

The fourth proportional to 516,187.84, 712,320.80 and 289,842.88 is: 399,972.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    516,187.84 : 712,320.80 = 289,842.88 : x
  2. Step 2: Convert to fraction form
    516,187.84/712,320.80 = 289,842.88/x
  3. Step 3: Cross multiply
    516,187.84x = 712,320.80 × 289,842.88
  4. Step 4: Simplify right side
    516,187.84x = 206,461,112,155.90
  5. Step 5: Solve for x
    x = 206,461,112,155.90/516,187.84
  6. Step 6: Final answer
    x = 399,972.83

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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.