Home / 512,923.64-769,288.82-138,897.40

Finding the Fourth Proportional to 512,923.64, 769,288.82 and 138,897.40

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Solution

The fourth proportional to 512,923.64, 769,288.82 and 138,897.40 is: 208,319.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,923.64 : 769,288.82 = 138,897.40 : x
  2. Step 2: Convert to fraction form
    512,923.64/769,288.82 = 138,897.40/x
  3. Step 3: Cross multiply
    512,923.64x = 769,288.82 × 138,897.40
  4. Step 4: Simplify right side
    512,923.64x = 106,852,216,947.07
  5. Step 5: Solve for x
    x = 106,852,216,947.07/512,923.64
  6. Step 6: Final answer
    x = 208,319.93

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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.