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Finding the Fourth Proportional to 304,451.10, 420,132.15 and 168,490.78

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Solution

The fourth proportional to 304,451.10, 420,132.15 and 168,490.78 is: 232,511.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    304,451.10 : 420,132.15 = 168,490.78 : x
  2. Step 2: Convert to fraction form
    304,451.10/420,132.15 = 168,490.78/x
  3. Step 3: Cross multiply
    304,451.10x = 420,132.15 × 168,490.78
  4. Step 4: Simplify right side
    304,451.10x = 70,788,392,606.25
  5. Step 5: Solve for x
    x = 70,788,392,606.25/304,451.10
  6. Step 6: Final answer
    x = 232,511.54

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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.