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Finding the Fourth Proportional to 643,019.60, 886,855.08 and 413,603.24

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Solution

The fourth proportional to 643,019.60, 886,855.08 and 413,603.24 is: 570,443.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,019.60 : 886,855.08 = 413,603.24 : x
  2. Step 2: Convert to fraction form
    643,019.60/886,855.08 = 413,603.24/x
  3. Step 3: Cross multiply
    643,019.60x = 886,855.08 × 413,603.24
  4. Step 4: Simplify right side
    643,019.60x = 366,806,134,498.46
  5. Step 5: Solve for x
    x = 366,806,134,498.46/643,019.60
  6. Step 6: Final answer
    x = 570,443.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.