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Finding the Fourth Proportional to 1,296,831.40, 1,946,399.10 and 763,685.80

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Solution

The fourth proportional to 1,296,831.40, 1,946,399.10 and 763,685.80 is: 1,146,207.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296,831.40 : 1,946,399.10 = 763,685.80 : x
  2. Step 2: Convert to fraction form
    1,296,831.40/1,946,399.10 = 763,685.80/x
  3. Step 3: Cross multiply
    1,296,831.40x = 1,946,399.10 × 763,685.80
  4. Step 4: Simplify right side
    1,296,831.40x = 1,486,437,353,802.78
  5. Step 5: Solve for x
    x = 1,486,437,353,802.78/1,296,831.40
  6. Step 6: Final answer
    x = 1,146,207.10

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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.