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Finding the Fourth Proportional to 319,875.64, 479,881.12 and 120,197.76

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Solution

The fourth proportional to 319,875.64, 479,881.12 and 120,197.76 is: 180,322.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,875.64 : 479,881.12 = 120,197.76 : x
  2. Step 2: Convert to fraction form
    319,875.64/479,881.12 = 120,197.76/x
  3. Step 3: Cross multiply
    319,875.64x = 479,881.12 × 120,197.76
  4. Step 4: Simplify right side
    319,875.64x = 57,680,635,690.29
  5. Step 5: Solve for x
    x = 57,680,635,690.29/319,875.64
  6. Step 6: Final answer
    x = 180,322.06

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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.