Home / 3,121,128-4,307,156.64-1,690,344

Finding the Fourth Proportional to 3,121,128, 4,307,156.64 and 1,690,344

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Solution

The fourth proportional to 3,121,128, 4,307,156.64 and 1,690,344 is: 2,332,674.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121,128 : 4,307,156.64 = 1,690,344 : x
  2. Step 2: Convert to fraction form
    3,121,128/4,307,156.64 = 1,690,344/x
  3. Step 3: Cross multiply
    3,121,128x = 4,307,156.64 × 1,690,344
  4. Step 4: Simplify right side
    3,121,128x = 7,280,576,383,484.16
  5. Step 5: Solve for x
    x = 7,280,576,383,484.16/3,121,128
  6. Step 6: Final answer
    x = 2,332,674.72

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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.