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Finding the Fourth Proportional to 440,416.48, 660,638.43 and 209,554.88

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Solution

The fourth proportional to 440,416.48, 660,638.43 and 209,554.88 is: 314,338.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,416.48 : 660,638.43 = 209,554.88 : x
  2. Step 2: Convert to fraction form
    440,416.48/660,638.43 = 209,554.88/x
  3. Step 3: Cross multiply
    440,416.48x = 660,638.43 × 209,554.88
  4. Step 4: Simplify right side
    440,416.48x = 138,440,008,573.63
  5. Step 5: Solve for x
    x = 138,440,008,573.63/440,416.48
  6. Step 6: Final answer
    x = 314,338.85

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1.5x scale

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.