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Finding the Fourth Proportional to 521,845.58, 720,134.72 and 306,999.48

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Solution

The fourth proportional to 521,845.58, 720,134.72 and 306,999.48 is: 423,652.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,845.58 : 720,134.72 = 306,999.48 : x
  2. Step 2: Convert to fraction form
    521,845.58/720,134.72 = 306,999.48/x
  3. Step 3: Cross multiply
    521,845.58x = 720,134.72 × 306,999.48
  4. Step 4: Simplify right side
    521,845.58x = 221,080,984,569.95
  5. Step 5: Solve for x
    x = 221,080,984,569.95/521,845.58
  6. Step 6: Final answer
    x = 423,652.12

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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.