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Finding the Fourth Proportional to 319,143.20, 478,599.60 and 161,319.20

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Solution

The fourth proportional to 319,143.20, 478,599.60 and 161,319.20 is: 241,920.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,143.20 : 478,599.60 = 161,319.20 : x
  2. Step 2: Convert to fraction form
    319,143.20/478,599.60 = 161,319.20/x
  3. Step 3: Cross multiply
    319,143.20x = 478,599.60 × 161,319.20
  4. Step 4: Simplify right side
    319,143.20x = 77,207,304,592.32
  5. Step 5: Solve for x
    x = 77,207,304,592.32/319,143.20
  6. Step 6: Final answer
    x = 241,920.57

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1.5x scale

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.