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Finding the Fourth Proportional to 528,665.32, 729,538.59 and 286,942.69

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Solution

The fourth proportional to 528,665.32, 729,538.59 and 286,942.69 is: 395,970.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,665.32 : 729,538.59 = 286,942.69 : x
  2. Step 2: Convert to fraction form
    528,665.32/729,538.59 = 286,942.69/x
  3. Step 3: Cross multiply
    528,665.32x = 729,538.59 × 286,942.69
  4. Step 4: Simplify right side
    528,665.32x = 209,335,765,473.41
  5. Step 5: Solve for x
    x = 209,335,765,473.41/528,665.32
  6. Step 6: Final answer
    x = 395,970.30

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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.