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Finding the Fourth Proportional to 642,658.85, 886,834.92 and 370,710.45

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Solution

The fourth proportional to 642,658.85, 886,834.92 and 370,710.45 is: 511,560.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,658.85 : 886,834.92 = 370,710.45 : x
  2. Step 2: Convert to fraction form
    642,658.85/886,834.92 = 370,710.45/x
  3. Step 3: Cross multiply
    642,658.85x = 886,834.92 × 370,710.45
  4. Step 4: Simplify right side
    642,658.85x = 328,758,972,268.91
  5. Step 5: Solve for x
    x = 328,758,972,268.91/642,658.85
  6. Step 6: Final answer
    x = 511,560.64

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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.