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Finding the Fourth Proportional to 858,697.20, 1,288,045.80 and 783,901.80

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Solution

The fourth proportional to 858,697.20, 1,288,045.80 and 783,901.80 is: 1,175,852.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,697.20 : 1,288,045.80 = 783,901.80 : x
  2. Step 2: Convert to fraction form
    858,697.20/1,288,045.80 = 783,901.80/x
  3. Step 3: Cross multiply
    858,697.20x = 1,288,045.80 × 783,901.80
  4. Step 4: Simplify right side
    858,697.20x = 1,009,701,421,102.44
  5. Step 5: Solve for x
    x = 1,009,701,421,102.44/858,697.20
  6. Step 6: Final answer
    x = 1,175,852.70

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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.