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Finding the Fourth Proportional to 642,137.69, 886,745.68 and 480,712.48

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Solution

The fourth proportional to 642,137.69, 886,745.68 and 480,712.48 is: 663,829.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,137.69 : 886,745.68 = 480,712.48 : x
  2. Step 2: Convert to fraction form
    642,137.69/886,745.68 = 480,712.48/x
  3. Step 3: Cross multiply
    642,137.69x = 886,745.68 × 480,712.48
  4. Step 4: Simplify right side
    642,137.69x = 426,269,711,543.44
  5. Step 5: Solve for x
    x = 426,269,711,543.44/642,137.69
  6. Step 6: Final answer
    x = 663,829.14

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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.