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Finding the Fourth Proportional to 620,622.20, 931,808.10 and 384,426.20

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Solution

The fourth proportional to 620,622.20, 931,808.10 and 384,426.20 is: 577,181.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,622.20 : 931,808.10 = 384,426.20 : x
  2. Step 2: Convert to fraction form
    620,622.20/931,808.10 = 384,426.20/x
  3. Step 3: Cross multiply
    620,622.20x = 931,808.10 × 384,426.20
  4. Step 4: Simplify right side
    620,622.20x = 358,211,447,012.22
  5. Step 5: Solve for x
    x = 358,211,447,012.22/620,622.20
  6. Step 6: Final answer
    x = 577,181.17

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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.