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Finding the Fourth Proportional to 258,719.70, 388,079.64 and 116,398.76

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Solution

The fourth proportional to 258,719.70, 388,079.64 and 116,398.76 is: 174,598.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,719.70 : 388,079.64 = 116,398.76 : x
  2. Step 2: Convert to fraction form
    258,719.70/388,079.64 = 116,398.76/x
  3. Step 3: Cross multiply
    258,719.70x = 388,079.64 × 116,398.76
  4. Step 4: Simplify right side
    258,719.70x = 45,171,988,877.25
  5. Step 5: Solve for x
    x = 45,171,988,877.25/258,719.70
  6. Step 6: Final answer
    x = 174,598.18

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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.