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Finding the Fourth Proportional to 661,639.70, 992,459.55 and 603,902.90

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Solution

The fourth proportional to 661,639.70, 992,459.55 and 603,902.90 is: 905,854.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,639.70 : 992,459.55 = 603,902.90 : x
  2. Step 2: Convert to fraction form
    661,639.70/992,459.55 = 603,902.90/x
  3. Step 3: Cross multiply
    661,639.70x = 992,459.55 × 603,902.90
  4. Step 4: Simplify right side
    661,639.70x = 599,349,200,377.70
  5. Step 5: Solve for x
    x = 599,349,200,377.70/661,639.70
  6. Step 6: Final answer
    x = 905,854.35

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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.