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Finding the Fourth Proportional to 867,939.20, 1,301,908.80 and 779,584.40

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Solution

The fourth proportional to 867,939.20, 1,301,908.80 and 779,584.40 is: 1,169,376.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,939.20 : 1,301,908.80 = 779,584.40 : x
  2. Step 2: Convert to fraction form
    867,939.20/1,301,908.80 = 779,584.40/x
  3. Step 3: Cross multiply
    867,939.20x = 1,301,908.80 × 779,584.40
  4. Step 4: Simplify right side
    867,939.20x = 1,014,947,790,702.72
  5. Step 5: Solve for x
    x = 1,014,947,790,702.72/867,939.20
  6. Step 6: Final answer
    x = 1,169,376.60

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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.