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Finding the Fourth Proportional to 642,796.08, 886,965.36 and 356,316

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Solution

The fourth proportional to 642,796.08, 886,965.36 and 356,316 is: 491,664.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,796.08 : 886,965.36 = 356,316 : x
  2. Step 2: Convert to fraction form
    642,796.08/886,965.36 = 356,316/x
  3. Step 3: Cross multiply
    642,796.08x = 886,965.36 × 356,316
  4. Step 4: Simplify right side
    642,796.08x = 316,039,949,213.76
  5. Step 5: Solve for x
    x = 316,039,949,213.76/642,796.08
  6. Step 6: Final answer
    x = 491,664.40

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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.