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Finding the Fourth Proportional to 617,999.70, 867,687.90 and 617,999.70

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Solution

The fourth proportional to 617,999.70, 867,687.90 and 617,999.70 is: 867,687.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,999.70 : 867,687.90 = 617,999.70 : x
  2. Step 2: Convert to fraction form
    617,999.70/867,687.90 = 617,999.70/x
  3. Step 3: Cross multiply
    617,999.70x = 867,687.90 × 617,999.70
  4. Step 4: Simplify right side
    617,999.70x = 536,230,861,893.63
  5. Step 5: Solve for x
    x = 536,230,861,893.63/617,999.70
  6. Step 6: Final answer
    x = 867,687.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.