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Finding the Fourth Proportional to 355,587.20, 533,186.40 and 144,987.20

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Solution

The fourth proportional to 355,587.20, 533,186.40 and 144,987.20 is: 217,401.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,587.20 : 533,186.40 = 144,987.20 : x
  2. Step 2: Convert to fraction form
    355,587.20/533,186.40 = 144,987.20/x
  3. Step 3: Cross multiply
    355,587.20x = 533,186.40 × 144,987.20
  4. Step 4: Simplify right side
    355,587.20x = 77,305,203,214.08
  5. Step 5: Solve for x
    x = 77,305,203,214.08/355,587.20
  6. Step 6: Final answer
    x = 217,401.54

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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.