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Finding the Fourth Proportional to 671,025, 925,709.36 and 398,938.50

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Solution

The fourth proportional to 671,025, 925,709.36 and 398,938.50 is: 550,353.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,025 : 925,709.36 = 398,938.50 : x
  2. Step 2: Convert to fraction form
    671,025/925,709.36 = 398,938.50/x
  3. Step 3: Cross multiply
    671,025x = 925,709.36 × 398,938.50
  4. Step 4: Simplify right side
    671,025x = 369,301,103,514.36
  5. Step 5: Solve for x
    x = 369,301,103,514.36/671,025
  6. Step 6: Final answer
    x = 550,353.72

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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.