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Finding the Fourth Proportional to 380,740.70, 570,709.14 and 127,781.30

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Solution

The fourth proportional to 380,740.70, 570,709.14 and 127,781.30 is: 191,537.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,740.70 : 570,709.14 = 127,781.30 : x
  2. Step 2: Convert to fraction form
    380,740.70/570,709.14 = 127,781.30/x
  3. Step 3: Cross multiply
    380,740.70x = 570,709.14 × 127,781.30
  4. Step 4: Simplify right side
    380,740.70x = 72,925,955,831.08
  5. Step 5: Solve for x
    x = 72,925,955,831.08/380,740.70
  6. Step 6: Final answer
    x = 191,537.06

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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.