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Finding the Fourth Proportional to 641,760.48, 885,601.56 and 355,263.48

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Solution

The fourth proportional to 641,760.48, 885,601.56 and 355,263.48 is: 490,248.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,760.48 : 885,601.56 = 355,263.48 : x
  2. Step 2: Convert to fraction form
    641,760.48/885,601.56 = 355,263.48/x
  3. Step 3: Cross multiply
    641,760.48x = 885,601.56 × 355,263.48
  4. Step 4: Simplify right side
    641,760.48x = 314,621,892,099.03
  5. Step 5: Solve for x
    x = 314,621,892,099.03/641,760.48
  6. Step 6: Final answer
    x = 490,248.16

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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.