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Finding the Fourth Proportional to 445,045.60, 667,760.40 and 258,216.80

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Solution

The fourth proportional to 445,045.60, 667,760.40 and 258,216.80 is: 387,436.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,045.60 : 667,760.40 = 258,216.80 : x
  2. Step 2: Convert to fraction form
    445,045.60/667,760.40 = 258,216.80/x
  3. Step 3: Cross multiply
    445,045.60x = 667,760.40 × 258,216.80
  4. Step 4: Simplify right side
    445,045.60x = 172,426,953,654.72
  5. Step 5: Solve for x
    x = 172,426,953,654.72/445,045.60
  6. Step 6: Final answer
    x = 387,436.60

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1.5x scale

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.