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Finding the Fourth Proportional to 671,026, 925,710.74 and 398,939.50

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Solution

The fourth proportional to 671,026, 925,710.74 and 398,939.50 is: 550,355.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,026 : 925,710.74 = 398,939.50 : x
  2. Step 2: Convert to fraction form
    671,026/925,710.74 = 398,939.50/x
  3. Step 3: Cross multiply
    671,026x = 925,710.74 × 398,939.50
  4. Step 4: Simplify right side
    671,026x = 369,302,579,760.23
  5. Step 5: Solve for x
    x = 369,302,579,760.23/671,026
  6. Step 6: Final answer
    x = 550,355.10

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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.