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Finding the Fourth Proportional to 777,410.40, 1,167,865.20 and 756,415.20

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Solution

The fourth proportional to 777,410.40, 1,167,865.20 and 756,415.20 is: 1,136,325.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,410.40 : 1,167,865.20 = 756,415.20 : x
  2. Step 2: Convert to fraction form
    777,410.40/1,167,865.20 = 756,415.20/x
  3. Step 3: Cross multiply
    777,410.40x = 1,167,865.20 × 756,415.20
  4. Step 4: Simplify right side
    777,410.40x = 883,390,988,831.04
  5. Step 5: Solve for x
    x = 883,390,988,831.04/777,410.40
  6. Step 6: Final answer
    x = 1,136,325.15

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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.