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Finding the Fourth Proportional to 571,671.46, 857,508.20 and 172,426.51

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Solution

The fourth proportional to 571,671.46, 857,508.20 and 172,426.51 is: 258,640.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,671.46 : 857,508.20 = 172,426.51 : x
  2. Step 2: Convert to fraction form
    571,671.46/857,508.20 = 172,426.51/x
  3. Step 3: Cross multiply
    571,671.46x = 857,508.20 × 172,426.51
  4. Step 4: Simplify right side
    571,671.46x = 147,857,146,222.38
  5. Step 5: Solve for x
    x = 147,857,146,222.38/571,671.46
  6. Step 6: Final answer
    x = 258,640.07

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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.