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Finding the Fourth Proportional to 485,058.32, 669,387.60 and 281,124.32

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Solution

The fourth proportional to 485,058.32, 669,387.60 and 281,124.32 is: 387,955.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,058.32 : 669,387.60 = 281,124.32 : x
  2. Step 2: Convert to fraction form
    485,058.32/669,387.60 = 281,124.32/x
  3. Step 3: Cross multiply
    485,058.32x = 669,387.60 × 281,124.32
  4. Step 4: Simplify right side
    485,058.32x = 188,181,133,866.43
  5. Step 5: Solve for x
    x = 188,181,133,866.43/485,058.32
  6. Step 6: Final answer
    x = 387,955.69

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1.5x scale

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.