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Finding the Fourth Proportional to 642,383.57, 886,450.76 and 355,882.93

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Solution

The fourth proportional to 642,383.57, 886,450.76 and 355,882.93 is: 491,097.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,383.57 : 886,450.76 = 355,882.93 : x
  2. Step 2: Convert to fraction form
    642,383.57/886,450.76 = 355,882.93/x
  3. Step 3: Cross multiply
    642,383.57x = 886,450.76 × 355,882.93
  4. Step 4: Simplify right side
    642,383.57x = 315,472,693,769.53
  5. Step 5: Solve for x
    x = 315,472,693,769.53/642,383.57
  6. Step 6: Final answer
    x = 491,097.08

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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.