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Finding the Fourth Proportional to 621,808.80, 931,546.80 and 579,818.40

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Solution

The fourth proportional to 621,808.80, 931,546.80 and 579,818.40 is: 868,639.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,808.80 : 931,546.80 = 579,818.40 : x
  2. Step 2: Convert to fraction form
    621,808.80/931,546.80 = 579,818.40/x
  3. Step 3: Cross multiply
    621,808.80x = 931,546.80 × 579,818.40
  4. Step 4: Simplify right side
    621,808.80x = 540,127,975,101.12
  5. Step 5: Solve for x
    x = 540,127,975,101.12/621,808.80
  6. Step 6: Final answer
    x = 868,639.97

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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.