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Finding the Fourth Proportional to 401,615.20, 602,509.20 and 121,160.80

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Solution

The fourth proportional to 401,615.20, 602,509.20 and 121,160.80 is: 181,767.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,615.20 : 602,509.20 = 121,160.80 : x
  2. Step 2: Convert to fraction form
    401,615.20/602,509.20 = 121,160.80/x
  3. Step 3: Cross multiply
    401,615.20x = 602,509.20 × 121,160.80
  4. Step 4: Simplify right side
    401,615.20x = 73,000,496,679.36
  5. Step 5: Solve for x
    x = 73,000,496,679.36/401,615.20
  6. Step 6: Final answer
    x = 181,767.27

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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.