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Finding the Fourth Proportional to 319,313.89, 478,970.84 and 129,877.32

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Solution

The fourth proportional to 319,313.89, 478,970.84 and 129,877.32 is: 194,815.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,313.89 : 478,970.84 = 129,877.32 : x
  2. Step 2: Convert to fraction form
    319,313.89/478,970.84 = 129,877.32/x
  3. Step 3: Cross multiply
    319,313.89x = 478,970.84 × 129,877.32
  4. Step 4: Simplify right side
    319,313.89x = 62,207,448,407.96
  5. Step 5: Solve for x
    x = 62,207,448,407.96/319,313.89
  6. Step 6: Final answer
    x = 194,815.98

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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.