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Finding the Fourth Proportional to 561,813.20, 775,370.28 and 316,844.60

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Solution

The fourth proportional to 561,813.20, 775,370.28 and 316,844.60 is: 437,283.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,813.20 : 775,370.28 = 316,844.60 : x
  2. Step 2: Convert to fraction form
    561,813.20/775,370.28 = 316,844.60/x
  3. Step 3: Cross multiply
    561,813.20x = 775,370.28 × 316,844.60
  4. Step 4: Simplify right side
    561,813.20x = 245,671,886,218.49
  5. Step 5: Solve for x
    x = 245,671,886,218.49/561,813.20
  6. Step 6: Final answer
    x = 437,283.93

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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.