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Finding the Fourth Proportional to 438,990.63, 658,471.26 and 186,108.42

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Solution

The fourth proportional to 438,990.63, 658,471.26 and 186,108.42 is: 279,156.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,990.63 : 658,471.26 = 186,108.42 : x
  2. Step 2: Convert to fraction form
    438,990.63/658,471.26 = 186,108.42/x
  3. Step 3: Cross multiply
    438,990.63x = 658,471.26 × 186,108.42
  4. Step 4: Simplify right side
    438,990.63x = 122,547,045,814.01
  5. Step 5: Solve for x
    x = 122,547,045,814.01/438,990.63
  6. Step 6: Final answer
    x = 279,156.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.