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Finding the Fourth Proportional to 528,390.81, 729,180.63 and 286,673.32

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Solution

The fourth proportional to 528,390.81, 729,180.63 and 286,673.32 is: 395,609.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,390.81 : 729,180.63 = 286,673.32 : x
  2. Step 2: Convert to fraction form
    528,390.81/729,180.63 = 286,673.32/x
  3. Step 3: Cross multiply
    528,390.81x = 729,180.63 × 286,673.32
  4. Step 4: Simplify right side
    528,390.81x = 209,036,632,993.27
  5. Step 5: Solve for x
    x = 209,036,632,993.27/528,390.81
  6. Step 6: Final answer
    x = 395,609.90

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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.