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Finding the Fourth Proportional to 407,653.80, 611,480.70 and 112,165.80

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Solution

The fourth proportional to 407,653.80, 611,480.70 and 112,165.80 is: 168,248.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,653.80 : 611,480.70 = 112,165.80 : x
  2. Step 2: Convert to fraction form
    407,653.80/611,480.70 = 112,165.80/x
  3. Step 3: Cross multiply
    407,653.80x = 611,480.70 × 112,165.80
  4. Step 4: Simplify right side
    407,653.80x = 68,587,221,900.06
  5. Step 5: Solve for x
    x = 68,587,221,900.06/407,653.80
  6. Step 6: Final answer
    x = 168,248.70

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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.