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Finding the Fourth Proportional to 675,303.48, 931,815.36 and 388,768.20

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Solution

The fourth proportional to 675,303.48, 931,815.36 and 388,768.20 is: 536,440.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,303.48 : 931,815.36 = 388,768.20 : x
  2. Step 2: Convert to fraction form
    675,303.48/931,815.36 = 388,768.20/x
  3. Step 3: Cross multiply
    675,303.48x = 931,815.36 × 388,768.20
  4. Step 4: Simplify right side
    675,303.48x = 362,260,180,239.55
  5. Step 5: Solve for x
    x = 362,260,180,239.55/675,303.48
  6. Step 6: Final answer
    x = 536,440.56

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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.