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Finding the Fourth Proportional to 387,880.66, 534,971.68 and 265,445.56

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Solution

The fourth proportional to 387,880.66, 534,971.68 and 265,445.56 is: 366,107.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,880.66 : 534,971.68 = 265,445.56 : x
  2. Step 2: Convert to fraction form
    387,880.66/534,971.68 = 265,445.56/x
  3. Step 3: Cross multiply
    387,880.66x = 534,971.68 × 265,445.56
  4. Step 4: Simplify right side
    387,880.66x = 142,005,857,181.74
  5. Step 5: Solve for x
    x = 142,005,857,181.74/387,880.66
  6. Step 6: Final answer
    x = 366,107.08

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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.