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Finding the Fourth Proportional to 403,398.75, 556,842.57 and 317,132.67

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Solution

The fourth proportional to 403,398.75, 556,842.57 and 317,132.67 is: 437,762.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,398.75 : 556,842.57 = 317,132.67 : x
  2. Step 2: Convert to fraction form
    403,398.75/556,842.57 = 317,132.67/x
  3. Step 3: Cross multiply
    403,398.75x = 556,842.57 × 317,132.67
  4. Step 4: Simplify right side
    403,398.75x = 176,592,970,993.76
  5. Step 5: Solve for x
    x = 176,592,970,993.76/403,398.75
  6. Step 6: Final answer
    x = 437,762.81

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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.