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Finding the Fourth Proportional to 661,244.13, 911,672.12 and 428,259.42

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Solution

The fourth proportional to 661,244.13, 911,672.12 and 428,259.42 is: 590,450.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,244.13 : 911,672.12 = 428,259.42 : x
  2. Step 2: Convert to fraction form
    661,244.13/911,672.12 = 428,259.42/x
  3. Step 3: Cross multiply
    661,244.13x = 911,672.12 × 428,259.42
  4. Step 4: Simplify right side
    661,244.13x = 390,432,174,412.02
  5. Step 5: Solve for x
    x = 390,432,174,412.02/661,244.13
  6. Step 6: Final answer
    x = 590,450.87

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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.