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Finding the Fourth Proportional to 518,987.18, 716,202.75 and 289,544.51

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Solution

The fourth proportional to 518,987.18, 716,202.75 and 289,544.51 is: 399,571.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,987.18 : 716,202.75 = 289,544.51 : x
  2. Step 2: Convert to fraction form
    518,987.18/716,202.75 = 289,544.51/x
  3. Step 3: Cross multiply
    518,987.18x = 716,202.75 × 289,544.51
  4. Step 4: Simplify right side
    518,987.18x = 207,372,570,728.39
  5. Step 5: Solve for x
    x = 207,372,570,728.39/518,987.18
  6. Step 6: Final answer
    x = 399,571.67

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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.