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Finding the Fourth Proportional to 528,667.38, 729,541.44 and 286,944.78

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Solution

The fourth proportional to 528,667.38, 729,541.44 and 286,944.78 is: 395,973.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,667.38 : 729,541.44 = 286,944.78 : x
  2. Step 2: Convert to fraction form
    528,667.38/729,541.44 = 286,944.78/x
  3. Step 3: Cross multiply
    528,667.38x = 729,541.44 × 286,944.78
  4. Step 4: Simplify right side
    528,667.38x = 209,338,108,001.68
  5. Step 5: Solve for x
    x = 209,338,108,001.68/528,667.38
  6. Step 6: Final answer
    x = 395,973.19

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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.