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Finding the Fourth Proportional to 911,783.40, 1,367,675.10 and 868,237.80

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Solution

The fourth proportional to 911,783.40, 1,367,675.10 and 868,237.80 is: 1,302,356.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,783.40 : 1,367,675.10 = 868,237.80 : x
  2. Step 2: Convert to fraction form
    911,783.40/1,367,675.10 = 868,237.80/x
  3. Step 3: Cross multiply
    911,783.40x = 1,367,675.10 × 868,237.80
  4. Step 4: Simplify right side
    911,783.40x = 1,187,467,219,938.78
  5. Step 5: Solve for x
    x = 1,187,467,219,938.78/911,783.40
  6. Step 6: Final answer
    x = 1,302,356.70

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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.