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Finding the Fourth Proportional to 777,318.70, 1,163,344.54 and 477,988.87

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Solution

The fourth proportional to 777,318.70, 1,163,344.54 and 477,988.87 is: 715,363.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    777,318.70 : 1,163,344.54 = 477,988.87 : x
  2. Step 2: Convert to fraction form
    777,318.70/1,163,344.54 = 477,988.87/x
  3. Step 3: Cross multiply
    777,318.70x = 1,163,344.54 × 477,988.87
  4. Step 4: Simplify right side
    777,318.70x = 556,065,740,900.30
  5. Step 5: Solve for x
    x = 556,065,740,900.30/777,318.70
  6. Step 6: Final answer
    x = 715,363.91

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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.