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Finding the Fourth Proportional to 279,320.40, 418,980.60 and 279,320.40

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Solution

The fourth proportional to 279,320.40, 418,980.60 and 279,320.40 is: 418,980.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,320.40 : 418,980.60 = 279,320.40 : x
  2. Step 2: Convert to fraction form
    279,320.40/418,980.60 = 279,320.40/x
  3. Step 3: Cross multiply
    279,320.40x = 418,980.60 × 279,320.40
  4. Step 4: Simplify right side
    279,320.40x = 117,029,828,784.24
  5. Step 5: Solve for x
    x = 117,029,828,784.24/279,320.40
  6. Step 6: Final answer
    x = 418,980.60

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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.