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Finding the Fourth Proportional to 581,621.30, 815,928.70 and 581,621.30

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Solution

The fourth proportional to 581,621.30, 815,928.70 and 581,621.30 is: 815,928.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,621.30 : 815,928.70 = 581,621.30 : x
  2. Step 2: Convert to fraction form
    581,621.30/815,928.70 = 581,621.30/x
  3. Step 3: Cross multiply
    581,621.30x = 815,928.70 × 581,621.30
  4. Step 4: Simplify right side
    581,621.30x = 474,561,511,201.31
  5. Step 5: Solve for x
    x = 474,561,511,201.31/581,621.30
  6. Step 6: Final answer
    x = 815,928.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.