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Finding the Fourth Proportional to 515,796.20, 711,751.14 and 289,400.04

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Solution

The fourth proportional to 515,796.20, 711,751.14 and 289,400.04 is: 399,345.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,796.20 : 711,751.14 = 289,400.04 : x
  2. Step 2: Convert to fraction form
    515,796.20/711,751.14 = 289,400.04/x
  3. Step 3: Cross multiply
    515,796.20x = 711,751.14 × 289,400.04
  4. Step 4: Simplify right side
    515,796.20x = 205,980,808,386.05
  5. Step 5: Solve for x
    x = 205,980,808,386.05/515,796.20
  6. Step 6: Final answer
    x = 399,345.34

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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.