Home / 860,431.50-1,187,349.30-497,861.28

Finding the Fourth Proportional to 860,431.50, 1,187,349.30 and 497,861.28

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Solution

The fourth proportional to 860,431.50, 1,187,349.30 and 497,861.28 is: 687,021.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,431.50 : 1,187,349.30 = 497,861.28 : x
  2. Step 2: Convert to fraction form
    860,431.50/1,187,349.30 = 497,861.28/x
  3. Step 3: Cross multiply
    860,431.50x = 1,187,349.30 × 497,861.28
  4. Step 4: Simplify right side
    860,431.50x = 591,135,242,305.10
  5. Step 5: Solve for x
    x = 591,135,242,305.10/860,431.50
  6. Step 6: Final answer
    x = 687,021.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.