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Finding the Fourth Proportional to 572,072.88, 858,248.06 and 172,689.80

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Solution

The fourth proportional to 572,072.88, 858,248.06 and 172,689.80 is: 259,076.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,072.88 : 858,248.06 = 172,689.80 : x
  2. Step 2: Convert to fraction form
    572,072.88/858,248.06 = 172,689.80/x
  3. Step 3: Cross multiply
    572,072.88x = 858,248.06 × 172,689.80
  4. Step 4: Simplify right side
    572,072.88x = 148,210,680,677.10
  5. Step 5: Solve for x
    x = 148,210,680,677.10/572,072.88
  6. Step 6: Final answer
    x = 259,076.57

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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.