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Finding the Fourth Proportional to 279,068.40, 418,732.20 and 146,098.80

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Solution

The fourth proportional to 279,068.40, 418,732.20 and 146,098.80 is: 219,216.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,068.40 : 418,732.20 = 146,098.80 : x
  2. Step 2: Convert to fraction form
    279,068.40/418,732.20 = 146,098.80/x
  3. Step 3: Cross multiply
    279,068.40x = 418,732.20 × 146,098.80
  4. Step 4: Simplify right side
    279,068.40x = 61,176,271,941.36
  5. Step 5: Solve for x
    x = 61,176,271,941.36/279,068.40
  6. Step 6: Final answer
    x = 219,216.05

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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.