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Finding the Fourth Proportional to 558,991.97, 771,478.65 and 317,352.77

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Solution

The fourth proportional to 558,991.97, 771,478.65 and 317,352.77 is: 437,986.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,991.97 : 771,478.65 = 317,352.77 : x
  2. Step 2: Convert to fraction form
    558,991.97/771,478.65 = 317,352.77/x
  3. Step 3: Cross multiply
    558,991.97x = 771,478.65 × 317,352.77
  4. Step 4: Simplify right side
    558,991.97x = 244,830,886,573.36
  5. Step 5: Solve for x
    x = 244,830,886,573.36/558,991.97
  6. Step 6: Final answer
    x = 437,986.41

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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.