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Finding the Fourth Proportional to 319,260, 478,892.40 and 141,719.28

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Solution

The fourth proportional to 319,260, 478,892.40 and 141,719.28 is: 212,579.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,260 : 478,892.40 = 141,719.28 : x
  2. Step 2: Convert to fraction form
    319,260/478,892.40 = 141,719.28/x
  3. Step 3: Cross multiply
    319,260x = 478,892.40 × 141,719.28
  4. Step 4: Simplify right side
    319,260x = 67,868,286,125.47
  5. Step 5: Solve for x
    x = 67,868,286,125.47/319,260
  6. Step 6: Final answer
    x = 212,579.99

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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.