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Finding the Fourth Proportional to 620,634.80, 930,952.20 and 578,644.40

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Solution

The fourth proportional to 620,634.80, 930,952.20 and 578,644.40 is: 867,966.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,634.80 : 930,952.20 = 578,644.40 : x
  2. Step 2: Convert to fraction form
    620,634.80/930,952.20 = 578,644.40/x
  3. Step 3: Cross multiply
    620,634.80x = 930,952.20 × 578,644.40
  4. Step 4: Simplify right side
    620,634.80x = 538,690,277,197.68
  5. Step 5: Solve for x
    x = 538,690,277,197.68/620,634.80
  6. Step 6: Final answer
    x = 867,966.60

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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.