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Finding the Fourth Proportional to 315,672.50, 435,625.44 and 172,432.58

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Solution

The fourth proportional to 315,672.50, 435,625.44 and 172,432.58 is: 237,955.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,672.50 : 435,625.44 = 172,432.58 : x
  2. Step 2: Convert to fraction form
    315,672.50/435,625.44 = 172,432.58/x
  3. Step 3: Cross multiply
    315,672.50x = 435,625.44 × 172,432.58
  4. Step 4: Simplify right side
    315,672.50x = 75,116,018,532.84
  5. Step 5: Solve for x
    x = 75,116,018,532.84/315,672.50
  6. Step 6: Final answer
    x = 237,955.53

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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.