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Finding the Fourth Proportional to 671,026, 1,006,539 and 172,390

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Solution

The fourth proportional to 671,026, 1,006,539 and 172,390 is: 258,585

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,026 : 1,006,539 = 172,390 : x
  2. Step 2: Convert to fraction form
    671,026/1,006,539 = 172,390/x
  3. Step 3: Cross multiply
    671,026x = 1,006,539 × 172,390
  4. Step 4: Simplify right side
    671,026x = 173,517,258,210
  5. Step 5: Solve for x
    x = 173,517,258,210/671,026
  6. Step 6: Final answer
    x = 258,585

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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.