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Finding the Fourth Proportional to 613,630.40, 920,069.76 and 239,216

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Solution

The fourth proportional to 613,630.40, 920,069.76 and 239,216 is: 358,677.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,630.40 : 920,069.76 = 239,216 : x
  2. Step 2: Convert to fraction form
    613,630.40/920,069.76 = 239,216/x
  3. Step 3: Cross multiply
    613,630.40x = 920,069.76 × 239,216
  4. Step 4: Simplify right side
    613,630.40x = 220,095,407,708.16
  5. Step 5: Solve for x
    x = 220,095,407,708.16/613,630.40
  6. Step 6: Final answer
    x = 358,677.48

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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.