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Finding the Fourth Proportional to 515,028, 771,641.16 and 357,356.64

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Solution

The fourth proportional to 515,028, 771,641.16 and 357,356.64 is: 535,409.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,028 : 771,641.16 = 357,356.64 : x
  2. Step 2: Convert to fraction form
    515,028/771,641.16 = 357,356.64/x
  3. Step 3: Cross multiply
    515,028x = 771,641.16 × 357,356.64
  4. Step 4: Simplify right side
    515,028x = 275,751,092,223.30
  5. Step 5: Solve for x
    x = 275,751,092,223.30/515,028
  6. Step 6: Final answer
    x = 535,409.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.