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Finding the Fourth Proportional to 528,650.80, 729,518.55 and 286,928.19

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Solution

The fourth proportional to 528,650.80, 729,518.55 and 286,928.19 is: 395,950.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,650.80 : 729,518.55 = 286,928.19 : x
  2. Step 2: Convert to fraction form
    528,650.80/729,518.55 = 286,928.19/x
  3. Step 3: Cross multiply
    528,650.80x = 729,518.55 × 286,928.19
  4. Step 4: Simplify right side
    528,650.80x = 209,319,437,660.92
  5. Step 5: Solve for x
    x = 209,319,437,660.92/528,650.80
  6. Step 6: Final answer
    x = 395,950.29

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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.