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Finding the Fourth Proportional to 554,388.75, 765,056.35 and 312,670.80

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Solution

The fourth proportional to 554,388.75, 765,056.35 and 312,670.80 is: 431,485.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,388.75 : 765,056.35 = 312,670.80 : x
  2. Step 2: Convert to fraction form
    554,388.75/765,056.35 = 312,670.80/x
  3. Step 3: Cross multiply
    554,388.75x = 765,056.35 × 312,670.80
  4. Step 4: Simplify right side
    554,388.75x = 239,210,782,130.54
  5. Step 5: Solve for x
    x = 239,210,782,130.54/554,388.75
  6. Step 6: Final answer
    x = 431,485.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.