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Finding the Fourth Proportional to 642,832.16, 887,048.66 and 356,327.86

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Solution

The fourth proportional to 642,832.16, 887,048.66 and 356,327.86 is: 491,699.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,832.16 : 887,048.66 = 356,327.86 : x
  2. Step 2: Convert to fraction form
    642,832.16/887,048.66 = 356,327.86/x
  3. Step 3: Cross multiply
    642,832.16x = 887,048.66 × 356,327.86
  4. Step 4: Simplify right side
    642,832.16x = 316,080,150,733.67
  5. Step 5: Solve for x
    x = 316,080,150,733.67/642,832.16
  6. Step 6: Final answer
    x = 491,699.34

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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.