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Finding the Fourth Proportional to 279,006.40, 418,477.20 and 79,357.60

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Solution

The fourth proportional to 279,006.40, 418,477.20 and 79,357.60 is: 119,027.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,006.40 : 418,477.20 = 79,357.60 : x
  2. Step 2: Convert to fraction form
    279,006.40/418,477.20 = 79,357.60/x
  3. Step 3: Cross multiply
    279,006.40x = 418,477.20 × 79,357.60
  4. Step 4: Simplify right side
    279,006.40x = 33,209,346,246.72
  5. Step 5: Solve for x
    x = 33,209,346,246.72/279,006.40
  6. Step 6: Final answer
    x = 119,027.18

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1.5x scale

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.