Home / 860,689.72-1,187,788.62-498,129.40

Finding the Fourth Proportional to 860,689.72, 1,187,788.62 and 498,129.40

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Solution

The fourth proportional to 860,689.72, 1,187,788.62 and 498,129.40 is: 687,439.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,689.72 : 1,187,788.62 = 498,129.40 : x
  2. Step 2: Convert to fraction form
    860,689.72/1,187,788.62 = 498,129.40/x
  3. Step 3: Cross multiply
    860,689.72x = 1,187,788.62 × 498,129.40
  4. Step 4: Simplify right side
    860,689.72x = 591,672,432,607.43
  5. Step 5: Solve for x
    x = 591,672,432,607.43/860,689.72
  6. Step 6: Final answer
    x = 687,439.87

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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.