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Finding the Fourth Proportional to 387,959.72, 535,630.39 and 265,656.76

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Solution

The fourth proportional to 387,959.72, 535,630.39 and 265,656.76 is: 366,774.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,959.72 : 535,630.39 = 265,656.76 : x
  2. Step 2: Convert to fraction form
    387,959.72/535,630.39 = 265,656.76/x
  3. Step 3: Cross multiply
    387,959.72x = 535,630.39 × 265,656.76
  4. Step 4: Simplify right side
    387,959.72x = 142,293,831,961.72
  5. Step 5: Solve for x
    x = 142,293,831,961.72/387,959.72
  6. Step 6: Final answer
    x = 366,774.76

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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.