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Finding the Fourth Proportional to 346,739.20, 520,108.80 and 253,427.20

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Solution

The fourth proportional to 346,739.20, 520,108.80 and 253,427.20 is: 380,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,739.20 : 520,108.80 = 253,427.20 : x
  2. Step 2: Convert to fraction form
    346,739.20/520,108.80 = 253,427.20/x
  3. Step 3: Cross multiply
    346,739.20x = 520,108.80 × 253,427.20
  4. Step 4: Simplify right side
    346,739.20x = 131,809,716,879.36
  5. Step 5: Solve for x
    x = 131,809,716,879.36/346,739.20
  6. Step 6: Final answer
    x = 380,140.80

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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.