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Finding the Fourth Proportional to 867,007.80, 1,300,511.70 and 688,548.60

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Solution

The fourth proportional to 867,007.80, 1,300,511.70 and 688,548.60 is: 1,032,822.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,007.80 : 1,300,511.70 = 688,548.60 : x
  2. Step 2: Convert to fraction form
    867,007.80/1,300,511.70 = 688,548.60/x
  3. Step 3: Cross multiply
    867,007.80x = 1,300,511.70 × 688,548.60
  4. Step 4: Simplify right side
    867,007.80x = 895,465,510,318.62
  5. Step 5: Solve for x
    x = 895,465,510,318.62/867,007.80
  6. Step 6: Final answer
    x = 1,032,822.90

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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.