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Finding the Fourth Proportional to 661,641.70, 992,462.55 and 603,904.90

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Solution

The fourth proportional to 661,641.70, 992,462.55 and 603,904.90 is: 905,857.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,641.70 : 992,462.55 = 603,904.90 : x
  2. Step 2: Convert to fraction form
    661,641.70/992,462.55 = 603,904.90/x
  3. Step 3: Cross multiply
    661,641.70x = 992,462.55 × 603,904.90
  4. Step 4: Simplify right side
    661,641.70x = 599,352,997,011.50
  5. Step 5: Solve for x
    x = 599,352,997,011.50/661,641.70
  6. Step 6: Final answer
    x = 905,857.35

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Half scale
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Double scale
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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.