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Finding the Fourth Proportional to 706,689.20, 1,057,441.80 and 520,065.20

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Solution

The fourth proportional to 706,689.20, 1,057,441.80 and 520,065.20 is: 778,190.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    706,689.20 : 1,057,441.80 = 520,065.20 : x
  2. Step 2: Convert to fraction form
    706,689.20/1,057,441.80 = 520,065.20/x
  3. Step 3: Cross multiply
    706,689.20x = 1,057,441.80 × 520,065.20
  4. Step 4: Simplify right side
    706,689.20x = 549,938,681,205.36
  5. Step 5: Solve for x
    x = 549,938,681,205.36/706,689.20
  6. Step 6: Final answer
    x = 778,190.30

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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.