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Finding the Fourth Proportional to 343,699.48, 515,482.47 and 172,875.64

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Solution

The fourth proportional to 343,699.48, 515,482.47 and 172,875.64 is: 259,279.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,699.48 : 515,482.47 = 172,875.64 : x
  2. Step 2: Convert to fraction form
    343,699.48/515,482.47 = 172,875.64/x
  3. Step 3: Cross multiply
    343,699.48x = 515,482.47 × 172,875.64
  4. Step 4: Simplify right side
    343,699.48x = 89,114,361,910.03
  5. Step 5: Solve for x
    x = 89,114,361,910.03/343,699.48
  6. Step 6: Final answer
    x = 259,279.89

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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.