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Finding the Fourth Proportional to 642,551.52, 886,710.45 and 352,160.85

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Solution

The fourth proportional to 642,551.52, 886,710.45 and 352,160.85 is: 485,976.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,551.52 : 886,710.45 = 352,160.85 : x
  2. Step 2: Convert to fraction form
    642,551.52/886,710.45 = 352,160.85/x
  3. Step 3: Cross multiply
    642,551.52x = 886,710.45 × 352,160.85
  4. Step 4: Simplify right side
    642,551.52x = 312,264,705,775.88
  5. Step 5: Solve for x
    x = 312,264,705,775.88/642,551.52
  6. Step 6: Final answer
    x = 485,976.14

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1.5x scale

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.