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Finding the Fourth Proportional to 255,326.70, 382,990.05 and 171,345.90

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Solution

The fourth proportional to 255,326.70, 382,990.05 and 171,345.90 is: 257,018.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,326.70 : 382,990.05 = 171,345.90 : x
  2. Step 2: Convert to fraction form
    255,326.70/382,990.05 = 171,345.90/x
  3. Step 3: Cross multiply
    255,326.70x = 382,990.05 × 171,345.90
  4. Step 4: Simplify right side
    255,326.70x = 65,623,774,808.30
  5. Step 5: Solve for x
    x = 65,623,774,808.30/255,326.70
  6. Step 6: Final answer
    x = 257,018.85

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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.