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Finding the Fourth Proportional to 678,903.38, 936,903.15 and 372,999.56

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Solution

The fourth proportional to 678,903.38, 936,903.15 and 372,999.56 is: 514,748.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,903.38 : 936,903.15 = 372,999.56 : x
  2. Step 2: Convert to fraction form
    678,903.38/936,903.15 = 372,999.56/x
  3. Step 3: Cross multiply
    678,903.38x = 936,903.15 × 372,999.56
  4. Step 4: Simplify right side
    678,903.38x = 349,464,458,028.10
  5. Step 5: Solve for x
    x = 349,464,458,028.10/678,903.38
  6. Step 6: Final answer
    x = 514,748.45

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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.