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Finding the Fourth Proportional to 678,390.36, 936,180.53 and 372,486.57

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Solution

The fourth proportional to 678,390.36, 936,180.53 and 372,486.57 is: 514,032.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,390.36 : 936,180.53 = 372,486.57 : x
  2. Step 2: Convert to fraction form
    678,390.36/936,180.53 = 372,486.57/x
  3. Step 3: Cross multiply
    678,390.36x = 936,180.53 × 372,486.57
  4. Step 4: Simplify right side
    678,390.36x = 348,714,674,520.48
  5. Step 5: Solve for x
    x = 348,714,674,520.48/678,390.36
  6. Step 6: Final answer
    x = 514,032.47

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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.