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Finding the Fourth Proportional to 346,956.80, 520,046.40 and 147,243.20

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Solution

The fourth proportional to 346,956.80, 520,046.40 and 147,243.20 is: 220,699.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,956.80 : 520,046.40 = 147,243.20 : x
  2. Step 2: Convert to fraction form
    346,956.80/520,046.40 = 147,243.20/x
  3. Step 3: Cross multiply
    346,956.80x = 520,046.40 × 147,243.20
  4. Step 4: Simplify right side
    346,956.80x = 76,573,296,084.48
  5. Step 5: Solve for x
    x = 76,573,296,084.48/346,956.80
  6. Step 6: Final answer
    x = 220,699.80

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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.