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Finding the Fourth Proportional to 920,871.31, 1,270,633.71 and 512,963

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Solution

The fourth proportional to 920,871.31, 1,270,633.71 and 512,963 is: 707,794.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,871.31 : 1,270,633.71 = 512,963 : x
  2. Step 2: Convert to fraction form
    920,871.31/1,270,633.71 = 512,963/x
  3. Step 3: Cross multiply
    920,871.31x = 1,270,633.71 × 512,963
  4. Step 4: Simplify right side
    920,871.31x = 651,788,079,782.73
  5. Step 5: Solve for x
    x = 651,788,079,782.73/920,871.31
  6. Step 6: Final answer
    x = 707,794.97

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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.