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Finding the Fourth Proportional to 620,356.20, 931,409.10 and 384,160.20

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Solution

The fourth proportional to 620,356.20, 931,409.10 and 384,160.20 is: 576,782.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,356.20 : 931,409.10 = 384,160.20 : x
  2. Step 2: Convert to fraction form
    620,356.20/931,409.10 = 384,160.20/x
  3. Step 3: Cross multiply
    620,356.20x = 931,409.10 × 384,160.20
  4. Step 4: Simplify right side
    620,356.20x = 357,810,306,137.82
  5. Step 5: Solve for x
    x = 357,810,306,137.82/620,356.20
  6. Step 6: Final answer
    x = 576,782.03

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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.