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Finding the Fourth Proportional to 669,407.68, 923,002.14 and 499,346.56

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Solution

The fourth proportional to 669,407.68, 923,002.14 and 499,346.56 is: 688,516.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,407.68 : 923,002.14 = 499,346.56 : x
  2. Step 2: Convert to fraction form
    669,407.68/923,002.14 = 499,346.56/x
  3. Step 3: Cross multiply
    669,407.68x = 923,002.14 × 499,346.56
  4. Step 4: Simplify right side
    669,407.68x = 460,897,943,481.64
  5. Step 5: Solve for x
    x = 460,897,943,481.64/669,407.68
  6. Step 6: Final answer
    x = 688,516.07

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.