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Finding the Fourth Proportional to 528,659.32, 729,530.31 and 286,936.74

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Solution

The fourth proportional to 528,659.32, 729,530.31 and 286,936.74 is: 395,962.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,659.32 : 729,530.31 = 286,936.74 : x
  2. Step 2: Convert to fraction form
    528,659.32/729,530.31 = 286,936.74/x
  3. Step 3: Cross multiply
    528,659.32x = 729,530.31 × 286,936.74
  4. Step 4: Simplify right side
    528,659.32x = 209,329,048,882.59
  5. Step 5: Solve for x
    x = 209,329,048,882.59/528,659.32
  6. Step 6: Final answer
    x = 395,962.09

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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.