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Finding the Fourth Proportional to 642,589.35, 886,808.60 and 356,103.29

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Solution

The fourth proportional to 642,589.35, 886,808.60 and 356,103.29 is: 491,442.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,589.35 : 886,808.60 = 356,103.29 : x
  2. Step 2: Convert to fraction form
    642,589.35/886,808.60 = 356,103.29/x
  3. Step 3: Cross multiply
    642,589.35x = 886,808.60 × 356,103.29
  4. Step 4: Simplify right side
    642,589.35x = 315,795,460,060.29
  5. Step 5: Solve for x
    x = 315,795,460,060.29/642,589.35
  6. Step 6: Final answer
    x = 491,442.10

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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.