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Finding the Fourth Proportional to 1,273,984.80, 1,910,977.20 and 712,946.40

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Solution

The fourth proportional to 1,273,984.80, 1,910,977.20 and 712,946.40 is: 1,069,419.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273,984.80 : 1,910,977.20 = 712,946.40 : x
  2. Step 2: Convert to fraction form
    1,273,984.80/1,910,977.20 = 712,946.40/x
  3. Step 3: Cross multiply
    1,273,984.80x = 1,910,977.20 × 712,946.40
  4. Step 4: Simplify right side
    1,273,984.80x = 1,362,424,315,222.08
  5. Step 5: Solve for x
    x = 1,362,424,315,222.08/1,273,984.80
  6. Step 6: Final answer
    x = 1,069,419.60

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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.