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Finding the Fourth Proportional to 251,718.60, 376,703.10 and 172,986.60

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Solution

The fourth proportional to 251,718.60, 376,703.10 and 172,986.60 is: 258,878.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,718.60 : 376,703.10 = 172,986.60 : x
  2. Step 2: Convert to fraction form
    251,718.60/376,703.10 = 172,986.60/x
  3. Step 3: Cross multiply
    251,718.60x = 376,703.10 × 172,986.60
  4. Step 4: Simplify right side
    251,718.60x = 65,164,588,478.46
  5. Step 5: Solve for x
    x = 65,164,588,478.46/251,718.60
  6. Step 6: Final answer
    x = 258,878.72

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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.