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Finding the Fourth Proportional to 620,999.10, 931,498.65 and 520,615.80

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Solution

The fourth proportional to 620,999.10, 931,498.65 and 520,615.80 is: 780,923.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,999.10 : 931,498.65 = 520,615.80 : x
  2. Step 2: Convert to fraction form
    620,999.10/931,498.65 = 520,615.80/x
  3. Step 3: Cross multiply
    620,999.10x = 931,498.65 × 520,615.80
  4. Step 4: Simplify right side
    620,999.10x = 484,952,914,868.67
  5. Step 5: Solve for x
    x = 484,952,914,868.67/620,999.10
  6. Step 6: Final answer
    x = 780,923.70

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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.