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Finding the Fourth Proportional to 374,678.37, 561,754.71 and 137,990.70

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Solution

The fourth proportional to 374,678.37, 561,754.71 and 137,990.70 is: 206,889.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    374,678.37 : 561,754.71 = 137,990.70 : x
  2. Step 2: Convert to fraction form
    374,678.37/561,754.71 = 137,990.70/x
  3. Step 3: Cross multiply
    374,678.37x = 561,754.71 × 137,990.70
  4. Step 4: Simplify right side
    374,678.37x = 77,516,925,661.20
  5. Step 5: Solve for x
    x = 77,516,925,661.20/374,678.37
  6. Step 6: Final answer
    x = 206,889.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.