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Finding the Fourth Proportional to 620,660.80, 930,116.40 and 383,298.40

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Solution

The fourth proportional to 620,660.80, 930,116.40 and 383,298.40 is: 574,407.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,660.80 : 930,116.40 = 383,298.40 : x
  2. Step 2: Convert to fraction form
    620,660.80/930,116.40 = 383,298.40/x
  3. Step 3: Cross multiply
    620,660.80x = 930,116.40 × 383,298.40
  4. Step 4: Simplify right side
    620,660.80x = 356,512,127,933.76
  5. Step 5: Solve for x
    x = 356,512,127,933.76/620,660.80
  6. Step 6: Final answer
    x = 574,407.35

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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.