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Finding the Fourth Proportional to 423,987.60, 635,586.12 and 143,308.56

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Solution

The fourth proportional to 423,987.60, 635,586.12 and 143,308.56 is: 214,829.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,987.60 : 635,586.12 = 143,308.56 : x
  2. Step 2: Convert to fraction form
    423,987.60/635,586.12 = 143,308.56/x
  3. Step 3: Cross multiply
    423,987.60x = 635,586.12 × 143,308.56
  4. Step 4: Simplify right side
    423,987.60x = 91,084,931,613.19
  5. Step 5: Solve for x
    x = 91,084,931,613.19/423,987.60
  6. Step 6: Final answer
    x = 214,829.23

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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.