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Finding the Fourth Proportional to 572,688.62, 790,288.64 and 318,056.21

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Solution

The fourth proportional to 572,688.62, 790,288.64 and 318,056.21 is: 438,905.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,688.62 : 790,288.64 = 318,056.21 : x
  2. Step 2: Convert to fraction form
    572,688.62/790,288.64 = 318,056.21/x
  3. Step 3: Cross multiply
    572,688.62x = 790,288.64 × 318,056.21
  4. Step 4: Simplify right side
    572,688.62x = 251,356,204,102.73
  5. Step 5: Solve for x
    x = 251,356,204,102.73/572,688.62
  6. Step 6: Final answer
    x = 438,905.54

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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.