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Finding the Fourth Proportional to 528,681.60, 729,560.91 and 286,958.97

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Solution

The fourth proportional to 528,681.60, 729,560.91 and 286,958.97 is: 395,992.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,681.60 : 729,560.91 = 286,958.97 : x
  2. Step 2: Convert to fraction form
    528,681.60/729,560.91 = 286,958.97/x
  3. Step 3: Cross multiply
    528,681.60x = 729,560.91 × 286,958.97
  4. Step 4: Simplify right side
    528,681.60x = 209,354,047,285.86
  5. Step 5: Solve for x
    x = 209,354,047,285.86/528,681.60
  6. Step 6: Final answer
    x = 395,992.69

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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.