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Finding the Fourth Proportional to 386,807.70, 580,211.55 and 245,090.10

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Solution

The fourth proportional to 386,807.70, 580,211.55 and 245,090.10 is: 367,635.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,807.70 : 580,211.55 = 245,090.10 : x
  2. Step 2: Convert to fraction form
    386,807.70/580,211.55 = 245,090.10/x
  3. Step 3: Cross multiply
    386,807.70x = 580,211.55 × 245,090.10
  4. Step 4: Simplify right side
    386,807.70x = 142,204,106,810.66
  5. Step 5: Solve for x
    x = 142,204,106,810.66/386,807.70
  6. Step 6: Final answer
    x = 367,635.15

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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.