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Finding the Fourth Proportional to 1,200,871.13, 1,657,254 and 664,327.13

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Solution

The fourth proportional to 1,200,871.13, 1,657,254 and 664,327.13 is: 916,800.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200,871.13 : 1,657,254 = 664,327.13 : x
  2. Step 2: Convert to fraction form
    1,200,871.13/1,657,254 = 664,327.13/x
  3. Step 3: Cross multiply
    1,200,871.13x = 1,657,254 × 664,327.13
  4. Step 4: Simplify right side
    1,200,871.13x = 1,100,958,793,501.02
  5. Step 5: Solve for x
    x = 1,100,958,793,501.02/1,200,871.13
  6. Step 6: Final answer
    x = 916,800.12

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Double scale
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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.