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Finding the Fourth Proportional to 611,887.13, 917,515.55 and 274,638.67

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Solution

The fourth proportional to 611,887.13, 917,515.55 and 274,638.67 is: 411,816.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,887.13 : 917,515.55 = 274,638.67 : x
  2. Step 2: Convert to fraction form
    611,887.13/917,515.55 = 274,638.67/x
  3. Step 3: Cross multiply
    611,887.13x = 917,515.55 × 274,638.67
  4. Step 4: Simplify right side
    611,887.13x = 251,985,250,356.32
  5. Step 5: Solve for x
    x = 251,985,250,356.32/611,887.13
  6. Step 6: Final answer
    x = 411,816.56

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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.