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Finding the Fourth Proportional to 892,468.28, 1,230,565.56 and 665,720.12

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Solution

The fourth proportional to 892,468.28, 1,230,565.56 and 665,720.12 is: 917,917.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    892,468.28 : 1,230,565.56 = 665,720.12 : x
  2. Step 2: Convert to fraction form
    892,468.28/1,230,565.56 = 665,720.12/x
  3. Step 3: Cross multiply
    892,468.28x = 1,230,565.56 × 665,720.12
  4. Step 4: Simplify right side
    892,468.28x = 819,212,252,271.07
  5. Step 5: Solve for x
    x = 819,212,252,271.07/892,468.28
  6. Step 6: Final answer
    x = 917,917.50

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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.