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Finding the Fourth Proportional to 642,172.38, 886,197.86 and 355,710.92

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Solution

The fourth proportional to 642,172.38, 886,197.86 and 355,710.92 is: 490,881.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,172.38 : 886,197.86 = 355,710.92 : x
  2. Step 2: Convert to fraction form
    642,172.38/886,197.86 = 355,710.92/x
  3. Step 3: Cross multiply
    642,172.38x = 886,197.86 × 355,710.92
  4. Step 4: Simplify right side
    642,172.38x = 315,230,256,082.63
  5. Step 5: Solve for x
    x = 315,230,256,082.63/642,172.38
  6. Step 6: Final answer
    x = 490,881.06

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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.