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Finding the Fourth Proportional to 387,795.02, 535,189.45 and 215,745.40

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Solution

The fourth proportional to 387,795.02, 535,189.45 and 215,745.40 is: 297,746.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,795.02 : 535,189.45 = 215,745.40 : x
  2. Step 2: Convert to fraction form
    387,795.02/535,189.45 = 215,745.40/x
  3. Step 3: Cross multiply
    387,795.02x = 535,189.45 × 215,745.40
  4. Step 4: Simplify right side
    387,795.02x = 115,464,659,290.08
  5. Step 5: Solve for x
    x = 115,464,659,290.08/387,795.02
  6. Step 6: Final answer
    x = 297,746.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.