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Finding the Fourth Proportional to 528,586.25, 729,449.40 and 286,868.77

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Solution

The fourth proportional to 528,586.25, 729,449.40 and 286,868.77 is: 395,879.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,586.25 : 729,449.40 = 286,868.77 : x
  2. Step 2: Convert to fraction form
    528,586.25/729,449.40 = 286,868.77/x
  3. Step 3: Cross multiply
    528,586.25x = 729,449.40 × 286,868.77
  4. Step 4: Simplify right side
    528,586.25x = 209,256,252,155.24
  5. Step 5: Solve for x
    x = 209,256,252,155.24/528,586.25
  6. Step 6: Final answer
    x = 395,879.11

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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.