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Finding the Fourth Proportional to 1,934,831.60, 2,902,247.40 and 978,237.80

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Solution

The fourth proportional to 1,934,831.60, 2,902,247.40 and 978,237.80 is: 1,467,356.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,934,831.60 : 2,902,247.40 = 978,237.80 : x
  2. Step 2: Convert to fraction form
    1,934,831.60/2,902,247.40 = 978,237.80/x
  3. Step 3: Cross multiply
    1,934,831.60x = 2,902,247.40 × 978,237.80
  4. Step 4: Simplify right side
    1,934,831.60x = 2,839,088,111,631.72
  5. Step 5: Solve for x
    x = 2,839,088,111,631.72/1,934,831.60
  6. Step 6: Final answer
    x = 1,467,356.70

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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.