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Finding the Fourth Proportional to 613,239.60, 918,109.80 and 543,255.60

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Solution

The fourth proportional to 613,239.60, 918,109.80 and 543,255.60 is: 813,333.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,239.60 : 918,109.80 = 543,255.60 : x
  2. Step 2: Convert to fraction form
    613,239.60/918,109.80 = 543,255.60/x
  3. Step 3: Cross multiply
    613,239.60x = 918,109.80 × 543,255.60
  4. Step 4: Simplify right side
    613,239.60x = 498,768,290,264.88
  5. Step 5: Solve for x
    x = 498,768,290,264.88/613,239.60
  6. Step 6: Final answer
    x = 813,333.47

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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.