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Finding the Fourth Proportional to 675,911.64, 932,530.30 and 389,424.60

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Solution

The fourth proportional to 675,911.64, 932,530.30 and 389,424.60 is: 537,274.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,911.64 : 932,530.30 = 389,424.60 : x
  2. Step 2: Convert to fraction form
    675,911.64/932,530.30 = 389,424.60/x
  3. Step 3: Cross multiply
    675,911.64x = 932,530.30 × 389,424.60
  4. Step 4: Simplify right side
    675,911.64x = 363,150,239,065.38
  5. Step 5: Solve for x
    x = 363,150,239,065.38/675,911.64
  6. Step 6: Final answer
    x = 537,274.72

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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.