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Finding the Fourth Proportional to 423,813.60, 635,720.40 and 186,904.80

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Solution

The fourth proportional to 423,813.60, 635,720.40 and 186,904.80 is: 280,357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,813.60 : 635,720.40 = 186,904.80 : x
  2. Step 2: Convert to fraction form
    423,813.60/635,720.40 = 186,904.80/x
  3. Step 3: Cross multiply
    423,813.60x = 635,720.40 × 186,904.80
  4. Step 4: Simplify right side
    423,813.60x = 118,819,194,217.92
  5. Step 5: Solve for x
    x = 118,819,194,217.92/423,813.60
  6. Step 6: Final answer
    x = 280,357.20

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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.