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Finding the Fourth Proportional to 642,427.77, 886,550.76 and 355,952.64

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Solution

The fourth proportional to 642,427.77, 886,550.76 and 355,952.64 is: 491,214.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,427.77 : 886,550.76 = 355,952.64 : x
  2. Step 2: Convert to fraction form
    642,427.77/886,550.76 = 355,952.64/x
  3. Step 3: Cross multiply
    642,427.77x = 886,550.76 × 355,952.64
  4. Step 4: Simplify right side
    642,427.77x = 315,570,083,516.01
  5. Step 5: Solve for x
    x = 315,570,083,516.01/642,427.77
  6. Step 6: Final answer
    x = 491,214.89

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Double scale
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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.