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Finding the Fourth Proportional to 642,522.87, 886,670.92 and 352,132.20

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Solution

The fourth proportional to 642,522.87, 886,670.92 and 352,132.20 is: 485,936.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,522.87 : 886,670.92 = 352,132.20 : x
  2. Step 2: Convert to fraction form
    642,522.87/886,670.92 = 352,132.20/x
  3. Step 3: Cross multiply
    642,522.87x = 886,670.92 × 352,132.20
  4. Step 4: Simplify right side
    642,522.87x = 312,225,377,302.27
  5. Step 5: Solve for x
    x = 312,225,377,302.27/642,522.87
  6. Step 6: Final answer
    x = 485,936.60

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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.