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Finding the Fourth Proportional to 667,715.40, 999,729.90 and 520,259.40

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Solution

The fourth proportional to 667,715.40, 999,729.90 and 520,259.40 is: 778,952.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,715.40 : 999,729.90 = 520,259.40 : x
  2. Step 2: Convert to fraction form
    667,715.40/999,729.90 = 520,259.40/x
  3. Step 3: Cross multiply
    667,715.40x = 999,729.90 × 520,259.40
  4. Step 4: Simplify right side
    667,715.40x = 520,118,877,936.06
  5. Step 5: Solve for x
    x = 520,118,877,936.06/667,715.40
  6. Step 6: Final answer
    x = 778,952.95

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1.5x scale

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.