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Finding the Fourth Proportional to 638,762,537.80, 956,352,216.30 and 620,846,633.80

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Solution

The fourth proportional to 638,762,537.80, 956,352,216.30 and 620,846,633.80 is: 929,528,610.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,762,537.80 : 956,352,216.30 = 620,846,633.80 : x
  2. Step 2: Convert to fraction form
    638,762,537.80/956,352,216.30 = 620,846,633.80/x
  3. Step 3: Cross multiply
    638,762,537.80x = 956,352,216.30 × 620,846,633.80
  4. Step 4: Simplify right side
    638,762,537.80x = 593,748,054,217,024,384
  5. Step 5: Solve for x
    x = 593,748,054,217,024,384/638,762,537.80
  6. Step 6: Final answer
    x = 929,528,610.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.