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Finding the Fourth Proportional to 405,376.20, 608,009.10 and 105,880.20

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Solution

The fourth proportional to 405,376.20, 608,009.10 and 105,880.20 is: 158,805.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,376.20 : 608,009.10 = 105,880.20 : x
  2. Step 2: Convert to fraction form
    405,376.20/608,009.10 = 105,880.20/x
  3. Step 3: Cross multiply
    405,376.20x = 608,009.10 × 105,880.20
  4. Step 4: Simplify right side
    405,376.20x = 64,376,125,109.82
  5. Step 5: Solve for x
    x = 64,376,125,109.82/405,376.20
  6. Step 6: Final answer
    x = 158,805.88

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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.