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Finding the Fourth Proportional to 915,930.40, 1,373,506.80 and 442,760.80

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Solution

The fourth proportional to 915,930.40, 1,373,506.80 and 442,760.80 is: 663,953.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,930.40 : 1,373,506.80 = 442,760.80 : x
  2. Step 2: Convert to fraction form
    915,930.40/1,373,506.80 = 442,760.80/x
  3. Step 3: Cross multiply
    915,930.40x = 1,373,506.80 × 442,760.80
  4. Step 4: Simplify right side
    915,930.40x = 608,134,969,573.44
  5. Step 5: Solve for x
    x = 608,134,969,573.44/915,930.40
  6. Step 6: Final answer
    x = 663,953.25

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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.