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Finding the Fourth Proportional to 659,616.20, 989,813.10 and 435,624.20

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Solution

The fourth proportional to 659,616.20, 989,813.10 and 435,624.20 is: 653,693.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,616.20 : 989,813.10 = 435,624.20 : x
  2. Step 2: Convert to fraction form
    659,616.20/989,813.10 = 435,624.20/x
  3. Step 3: Cross multiply
    659,616.20x = 989,813.10 × 435,624.20
  4. Step 4: Simplify right side
    659,616.20x = 431,186,539,837.02
  5. Step 5: Solve for x
    x = 431,186,539,837.02/659,616.20
  6. Step 6: Final answer
    x = 653,693.07

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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.