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Finding the Fourth Proportional to 605,217,389.70, 907,826,084.55 and 398,593,128.90

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Solution

The fourth proportional to 605,217,389.70, 907,826,084.55 and 398,593,128.90 is: 597,889,693.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,217,389.70 : 907,826,084.55 = 398,593,128.90 : x
  2. Step 2: Convert to fraction form
    605,217,389.70/907,826,084.55 = 398,593,128.90/x
  3. Step 3: Cross multiply
    605,217,389.70x = 907,826,084.55 × 398,593,128.90
  4. Step 4: Simplify right side
    605,217,389.70x = 361,853,239,537,820,416
  5. Step 5: Solve for x
    x = 361,853,239,537,820,416/605,217,389.70
  6. Step 6: Final answer
    x = 597,889,693.35

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Similar ratio
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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.