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Finding the Fourth Proportional to 613,835.49, 847,135.53 and 372,128.25

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Solution

The fourth proportional to 613,835.49, 847,135.53 and 372,128.25 is: 513,562.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,835.49 : 847,135.53 = 372,128.25 : x
  2. Step 2: Convert to fraction form
    613,835.49/847,135.53 = 372,128.25/x
  3. Step 3: Cross multiply
    613,835.49x = 847,135.53 × 372,128.25
  4. Step 4: Simplify right side
    613,835.49x = 315,243,062,291.72
  5. Step 5: Solve for x
    x = 315,243,062,291.72/613,835.49
  6. Step 6: Final answer
    x = 513,562.78

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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.