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Finding the Fourth Proportional to 554,485.12, 765,172.24 and 312,764.16

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Solution

The fourth proportional to 554,485.12, 765,172.24 and 312,764.16 is: 431,604.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,485.12 : 765,172.24 = 312,764.16 : x
  2. Step 2: Convert to fraction form
    554,485.12/765,172.24 = 312,764.16/x
  3. Step 3: Cross multiply
    554,485.12x = 765,172.24 × 312,764.16
  4. Step 4: Simplify right side
    554,485.12x = 239,318,452,898.92
  5. Step 5: Solve for x
    x = 239,318,452,898.92/554,485.12
  6. Step 6: Final answer
    x = 431,604.82

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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.