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Finding the Fourth Proportional to 405,519.64, 608,215.66 and 255,300.08

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Solution

The fourth proportional to 405,519.64, 608,215.66 and 255,300.08 is: 382,909.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,519.64 : 608,215.66 = 255,300.08 : x
  2. Step 2: Convert to fraction form
    405,519.64/608,215.66 = 255,300.08/x
  3. Step 3: Cross multiply
    405,519.64x = 608,215.66 × 255,300.08
  4. Step 4: Simplify right side
    405,519.64x = 155,277,502,975.92
  5. Step 5: Solve for x
    x = 155,277,502,975.92/405,519.64
  6. Step 6: Final answer
    x = 382,909.95

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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.