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Finding the Fourth Proportional to 355,587.20, 533,726.40 and 215,619.20

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Solution

The fourth proportional to 355,587.20, 533,726.40 and 215,619.20 is: 323,638.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,587.20 : 533,726.40 = 215,619.20 : x
  2. Step 2: Convert to fraction form
    355,587.20/533,726.40 = 215,619.20/x
  3. Step 3: Cross multiply
    355,587.20x = 533,726.40 × 215,619.20
  4. Step 4: Simplify right side
    355,587.20x = 115,081,659,386.88
  5. Step 5: Solve for x
    x = 115,081,659,386.88/355,587.20
  6. Step 6: Final answer
    x = 323,638.36

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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.