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Finding the Fourth Proportional to 319,155.55, 478,326.30 and 169,467.55

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Solution

The fourth proportional to 319,155.55, 478,326.30 and 169,467.55 is: 253,985.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,155.55 : 478,326.30 = 169,467.55 : x
  2. Step 2: Convert to fraction form
    319,155.55/478,326.30 = 169,467.55/x
  3. Step 3: Cross multiply
    319,155.55x = 478,326.30 × 169,467.55
  4. Step 4: Simplify right side
    319,155.55x = 81,060,786,161.57
  5. Step 5: Solve for x
    x = 81,060,786,161.57/319,155.55
  6. Step 6: Final answer
    x = 253,985.20

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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.